diff --git a/adm/board_copy.php b/adm/board_copy.php
index 92b006256..291a225ac 100644
--- a/adm/board_copy.php
+++ b/adm/board_copy.php
@@ -58,6 +58,19 @@ include_once(G5_PATH.'/head.sub.php');
 <script>
 function fboardcopy_check(f)
 {
+    <?php
+    if(!$w){
+    $js_array = get_bo_table_banned_word();
+    echo "var banned_array = ". json_encode($js_array) . ";\n";
+    }
+    ?>
+
+    // 게시판명이 금지된 단어로 되어 있으면
+    if( (typeof banned_array != 'undefined') && jQuery.inArray(f.target_table.value, banned_array) !== -1 ){
+        alert("입력한 게시판 TABLE명을 사용할수 없습니다. 다른 이름으로 입력해 주세요.");
+        return false;
+    }
+
     if (f.bo_table.value == f.target_table.value) {
         alert("원본 테이블명과 복사할 테이블명이 달라야 합니다.");
         return false;
diff --git a/adm/board_copy_update.php b/adm/board_copy_update.php
index 772758484..9b3bd55a9 100644
--- a/adm/board_copy_update.php
+++ b/adm/board_copy_update.php
@@ -15,6 +15,11 @@ if (!preg_match('/[A-Za-z0-9_]{1,20}/', $target_table)) {
     alert('게시판 TABLE명은 공백없이 영문자, 숫자, _ 만 사용 가능합니다. (20자 이내)');
 }
 
+// 게시판명이 금지된 단어로 되어 있으면
+if ( $w == '' && in_array($target_table, get_bo_table_banned_word()) ){
+    alert('입력한 게시판 TABLE명을 사용할수 없습니다. 다른 이름으로 입력해 주세요.');
+}
+
 $row = sql_fetch(" select count(*) as cnt from {$g5['board_table']} where bo_table = '$target_table' ");
 if ($row['cnt'])
     alert($target_table.'은(는) 이미 존재하는 게시판 테이블명 입니다.\\n복사할 테이블명으로 사용할 수 없습니다.');
diff --git a/adm/board_form.php b/adm/board_form.php
index 272a25a09..3e60031d2 100644
--- a/adm/board_form.php
+++ b/adm/board_form.php
@@ -1372,6 +1372,19 @@ jQuery(function($){
 
 function fboardform_submit(f)
 {
+    <?php
+    if(!$w){
+    $js_array = get_bo_table_banned_word();
+    echo "var banned_array = ". json_encode($js_array) . ";\n";
+    }
+    ?>
+
+    // 게시판명이 금지된 단어로 되어 있으면
+    if( (typeof banned_array != 'undefined') && jQuery.inArray(f.bo_table.value, banned_array) !== -1 ){
+        alert("입력한 게시판 TABLE명을 사용할수 없습니다. 다른 이름으로 입력해 주세요.");
+        return false;
+    }
+
     <?php echo get_editor_js("bo_content_head"); ?>
     <?php echo get_editor_js("bo_content_tail"); ?>
     <?php echo get_editor_js("bo_mobile_content_head"); ?>
diff --git a/adm/board_form_update.php b/adm/board_form_update.php
index 01a21fe97..3f77760a5 100644
--- a/adm/board_form_update.php
+++ b/adm/board_form_update.php
@@ -17,6 +17,11 @@ if (!$bo_table) { alert('게시판 TABLE명은 반드시 입력하세요.'); }
 if (!preg_match("/^([A-Za-z0-9_]{1,20})$/", $bo_table)) { alert('게시판 TABLE명은 공백없이 영문자, 숫자, _ 만 사용 가능합니다. (20자 이내)'); }
 if (!$_POST['bo_subject']) { alert('게시판 제목을 입력하세요.'); }
 
+// 게시판명이 금지된 단어로 되어 있으면
+if ( $w == '' && in_array($bo_table, get_bo_table_banned_word()) ){
+    alert('입력한 게시판 TABLE명을 사용할수 없습니다. 다른 이름으로 입력해 주세요.');
+}
+
 $bo_include_head = preg_replace(array("#[\\\]+$#", "#(<\?php|<\?)#i"), "", substr($bo_include_head, 0, 255));
 $bo_include_tail = preg_replace(array("#[\\\]+$#", "#(<\?php|<\?)#i"), "", substr($bo_include_tail, 0, 255));
 
diff --git a/bbs/view_image.php b/bbs/view_image.php
index efa8d5a10..1b37753dd 100644
--- a/bbs/view_image.php
+++ b/bbs/view_image.php
@@ -25,7 +25,7 @@ if(strpos($filename, G5_DATA_DIR.'/editor')) {
 
 $file_exists = (is_file($filepath) && file_exists($filepath)) ? 1 : 0;
 
-if(run_replace('exists_view_image', $file_exists, $filepath, $editor_file)) {
+if($file_exists = run_replace('exists_view_image', $file_exists, $filepath, $editor_file)) {
     $size = $file_exists ? run_replace('get_view_imagesize', @getimagesize($filepath), $filepath, $editor_file) : array();
     if(empty($size))
         alert_close('이미지 파일이 아닙니다.');
diff --git a/head.php b/head.php
index b28652e83..bbf345c19 100644
--- a/head.php
+++ b/head.php
@@ -110,31 +110,8 @@ include_once(G5_LIB_PATH.'/popular.lib.php');
             <ul id="gnb_1dul">
                 <li class="gnb_1dli gnb_mnal"><button type="button" class="gnb_menu_btn" title="전체메뉴"><i class="fa fa-bars" aria-hidden="true"></i><span class="sound_only">전체메뉴열기</span></button></li>
                 <?php
-                $sql = " select *
-                            from {$g5['menu_table']}
-                            where me_use = '1'
-                              and length(me_code) = '2'
-                            order by me_order, me_id ";
-                $result = sql_query($sql, false);
-                $gnb_zindex = 999; // gnb_1dli z-index 값 설정용
-                $menu_datas = array();
-
-                for ($i=0; $row=sql_fetch_array($result); $i++) {
-                    $menu_datas[$i] = $row;
-
-                    $sql2 = " select *
-                                from {$g5['menu_table']}
-                                where me_use = '1'
-                                  and length(me_code) = '4'
-                                  and substring(me_code, 1, 2) = '{$row['me_code']}'
-                                order by me_order, me_id ";
-                    $result2 = sql_query($sql2);
-                    for ($k=0; $row2=sql_fetch_array($result2); $k++) {
-                        $menu_datas[$i]['sub'][$k] = $row2;
-                    }
-
-                }
-
+				$menu_datas = get_menu_db(0, true);
+				$gnb_zindex = 999; // gnb_1dli z-index 값 설정용
                 $i = 0;
                 foreach( $menu_datas as $row ){
                     if( empty($row) ) continue;
diff --git a/lib/get_data.lib.php b/lib/get_data.lib.php
index daf65e7f4..56e74a84f 100644
--- a/lib/get_data.lib.php
+++ b/lib/get_data.lib.php
@@ -88,6 +88,48 @@ function get_board_db($bo_table, $is_cache=false){
     return $cache[$key];
 }
 
+function get_menu_db($use_mobile=0, $is_cache=false){
+    global $g5;
+
+    static $cache = array();
+    
+	$cache = run_replace('get_menu_db_cache', $cache, $use_mobile, $is_cache);
+	
+	$key = md5($use_mobile);
+
+    if( $is_cache && isset($cache[$key]) ){
+        return $cache[$key];
+    }
+	
+	$where = $use_mobile ? "me_mobile_use = '1'" : "me_use = '1'";
+
+	if( !($cache[$key] = run_replace('get_menu_db', array(), $use_mobile)) ){
+		$sql = " select *
+					from {$g5['menu_table']}
+					where $where
+					  and length(me_code) = '2'
+					order by me_order, me_id ";
+		$result = sql_query($sql, false);
+
+		for ($i=0; $row=sql_fetch_array($result); $i++) {
+			$cache[$key][$i] = $row;
+
+			$sql2 = " select *
+						from {$g5['menu_table']}
+						where $where
+						  and length(me_code) = '4'
+						  and substring(me_code, 1, 2) = '{$row['me_code']}'
+						order by me_order, me_id ";
+			$result2 = sql_query($sql2);
+			for ($k=0; $row2=sql_fetch_array($result2); $k++) {
+				$cache[$key][$i]['sub'][$k] = $row2;
+			}
+		}
+	}
+
+	return $cache[$key];
+}
+
 // 게시판 테이블에서 하나의 행을 읽음
 function get_content_by_field($write_table, $type='bbs', $where_field='', $where_value='', $is_cache=false)
 {
diff --git a/mobile/head.php b/mobile/head.php
index 84286c1cf..1cbdee410 100644
--- a/mobile/head.php
+++ b/mobile/head.php
@@ -38,40 +38,32 @@ include_once(G5_LIB_PATH.'/popular.lib.php');
 			<?php echo outlogin('basic'); // 외부 로그인 ?>
             <ul id="gnb_1dul">
             <?php
-            $sql = " select *
-                        from {$g5['menu_table']}
-                        where me_mobile_use = '1'
-                          and length(me_code) = '2'
-                        order by me_order, me_id ";
-            $result = sql_query($sql, false);
-
-            for($i=0; $row=sql_fetch_array($result); $i++) {
+            $menu_datas = get_menu_db(1, true);
+			$i = 0;
+			foreach( $menu_datas as $row ){
+				if( empty($row) ) continue;
             ?>
                 <li class="gnb_1dli">
                     <a href="<?php echo $row['me_link']; ?>" target="_<?php echo $row['me_target']; ?>" class="gnb_1da"><?php echo $row['me_name'] ?></a>
                     <?php
-                    $sql2 = " select *
-                                from {$g5['menu_table']}
-                                where me_mobile_use = '1'
-                                  and length(me_code) = '4'
-                                  and substring(me_code, 1, 2) = '{$row['me_code']}'
-                                order by me_order, me_id ";
-                    $result2 = sql_query($sql2);
-
-                    for ($k=0; $row2=sql_fetch_array($result2); $k++) {
+                    $k = 0;
+                    foreach( (array) $row['sub'] as $row2 ){
+						if( empty($row2) ) continue;
                         if($k == 0)
                             echo '<button type="button" class="btn_gnb_op"><span class="sound_only">하위분류</span></button><ul class="gnb_2dul">'.PHP_EOL;
                     ?>
                         <li class="gnb_2dli"><a href="<?php echo $row2['me_link']; ?>" target="_<?php echo $row2['me_target']; ?>" class="gnb_2da"><span></span><?php echo $row2['me_name'] ?></a></li>
                     <?php
-                    }
+					$k++;
+                    }	//end foreach $row2
 
                     if($k > 0)
                         echo '</ul>'.PHP_EOL;
                     ?>
                 </li>
             <?php
-            }
+			$i++;
+            }	//end foreach $row
 
             if ($i == 0) {  ?>
                 <li id="gnb_empty">메뉴 준비 중입니다.<?php if ($is_admin) { ?> <br><a href="<?php echo G5_ADMIN_URL; ?>/menu_list.php">관리자모드 &gt; 환경설정 &gt; 메뉴설정</a>에서 설정하세요.<?php } ?></li>
diff --git a/theme/basic/head.php b/theme/basic/head.php
index 6ea95d57f..767bb1aa8 100644
--- a/theme/basic/head.php
+++ b/theme/basic/head.php
@@ -105,31 +105,7 @@ include_once(G5_LIB_PATH.'/popular.lib.php');
             <ul id="gnb_1dul">
                 <li class="gnb_1dli gnb_mnal"><button type="button" class="gnb_menu_btn" title="전체메뉴"><i class="fa fa-bars" aria-hidden="true"></i><span class="sound_only">전체메뉴열기</span></button></li>
                 <?php
-                $sql = " select *
-                            from {$g5['menu_table']}
-                            where me_use = '1'
-                              and length(me_code) = '2'
-                            order by me_order, me_id ";
-                $result = sql_query($sql, false);
-                $gnb_zindex = 999; // gnb_1dli z-index 값 설정용
-                $menu_datas = array();
-
-                for ($i=0; $row=sql_fetch_array($result); $i++) {
-                    $menu_datas[$i] = $row;
-
-                    $sql2 = " select *
-                                from {$g5['menu_table']}
-                                where me_use = '1'
-                                  and length(me_code) = '4'
-                                  and substring(me_code, 1, 2) = '{$row['me_code']}'
-                                order by me_order, me_id ";
-                    $result2 = sql_query($sql2);
-                    for ($k=0; $row2=sql_fetch_array($result2); $k++) {
-                        $menu_datas[$i]['sub'][$k] = $row2;
-                    }
-
-                }
-
+				$menu_datas = get_menu_db(0, true);
                 $i = 0;
                 foreach( $menu_datas as $row ){
                     if( empty($row) ) continue;
diff --git a/theme/basic/mobile/head.php b/theme/basic/mobile/head.php
index 823b37eab..07a937c80 100644
--- a/theme/basic/mobile/head.php
+++ b/theme/basic/mobile/head.php
@@ -33,40 +33,32 @@ include_once(G5_LIB_PATH.'/popular.lib.php');
 			<?php echo outlogin('theme/basic'); // 외부 로그인 ?>
             <ul id="gnb_1dul">
             <?php
-            $sql = " select *
-                        from {$g5['menu_table']}
-                        where me_mobile_use = '1'
-                          and length(me_code) = '2'
-                        order by me_order, me_id ";
-            $result = sql_query($sql, false);
-
-            for($i=0; $row=sql_fetch_array($result); $i++) {
+            $menu_datas = get_menu_db(1, true);
+			$i = 0;
+			foreach( $menu_datas as $row ){
+				if( empty($row) ) continue;
             ?>
                 <li class="gnb_1dli">
                     <a href="<?php echo $row['me_link']; ?>" target="_<?php echo $row['me_target']; ?>" class="gnb_1da"><?php echo $row['me_name'] ?></a>
                     <?php
-                    $sql2 = " select *
-                                from {$g5['menu_table']}
-                                where me_mobile_use = '1'
-                                  and length(me_code) = '4'
-                                  and substring(me_code, 1, 2) = '{$row['me_code']}'
-                                order by me_order, me_id ";
-                    $result2 = sql_query($sql2);
-
-                    for ($k=0; $row2=sql_fetch_array($result2); $k++) {
+                    $k = 0;
+                    foreach( (array) $row['sub'] as $row2 ){
+						if( empty($row2) ) continue;
                         if($k == 0)
                             echo '<button type="button" class="btn_gnb_op"><span class="sound_only">하위분류</span></button><ul class="gnb_2dul">'.PHP_EOL;
                     ?>
                         <li class="gnb_2dli"><a href="<?php echo $row2['me_link']; ?>" target="_<?php echo $row2['me_target']; ?>" class="gnb_2da"><span></span><?php echo $row2['me_name'] ?></a></li>
                     <?php
-                    }
+					$k++;
+                    }	//end foreach $row2
 
                     if($k > 0)
                         echo '</ul>'.PHP_EOL;
                     ?>
                 </li>
             <?php
-            }
+			$i++;
+            }	//end foreach $row
 
             if ($i == 0) {  ?>
                 <li id="gnb_empty">메뉴 준비 중입니다.<?php if ($is_admin) { ?> <br><a href="<?php echo G5_ADMIN_URL; ?>/menu_list.php">관리자모드 &gt; 환경설정 &gt; 메뉴설정</a>에서 설정하세요.<?php } ?></li>