diff --git a/css/default.css b/css/default.css
index 1187d1480..5d675ed12 100644
--- a/css/default.css
+++ b/css/default.css
@@ -81,11 +81,10 @@ a:active {color:#000;text-decoration:underline}
 .gnb_js .gnb_1depth a {text-align:center}
 .gnb_js .gnb_1depth_air a {float:none;background:#f7f7f2;color:#000}
 .gnb_js .gnb_1depth_on a {float:none;background:#fff;color:#000}
-.gnb_js ul ul {position:absolute;top:35px}
-.gnb_js .gnb_ul2 {width:1px;height:1px;overflow:hidden}
+.gnb_js .gnb_sub_ul {position:absolute;top:35px;width:1px;height:1px;overflow:hidden}
 .gnb_js .gnb_2depth a {display:inline-block;float:none !important;padding:0 10px;width:161px;text-align:left}
-.gnb_1depth_over .gnb_ul2 {left:-1px;width:181px;height:auto;border:1px solid #c3c7c5;border-top:0;background:#fff}
-.gnb_1depth_over2 .gnb_ul2 {right:-1px;width:181px;height:auto;border:1px solid #c3c7c5;border-top:0;background:#fff}
+.gnb_1depth_over .gnb_sub_ul {left:-1px;width:181px;height:auto;border:1px solid #c3c7c5;border-top:0;background:#fff}
+.gnb_1depth_over2 .gnb_sub_ul {right:-1px;width:181px;height:auto;border:1px solid #c3c7c5;border-top:0;background:#fff}
 
 /* 배포시에는 필요없는 부분 */
 #sirgle_title {height:100px;color:#fff;font-size:3em}
diff --git a/head.php b/head.php
index f76172255..3f28bc6a1 100644
--- a/head.php
+++ b/head.php
@@ -137,7 +137,7 @@ if ($config['cf_include_head']) {
         ?>
         <li class="gnb_1depth">
             <a href="<?=G4_BBS_URL?>/group.php?gr_id=<?=$row['gr_id']?>"><?=$row['gr_subject']?></a>
-            <ul>
+            <ul class="gnb_sub_ul">
                 <?
                 $sql2 = " select * from {$g4['board_table']} where gr_id = '{$row['gr_id']}' order by bo_order ";
                 $result2 = sql_query($sql2);