도대체 모르겠네요 ㅠㅠ..

<div class="navigation">            <nav>                <a href="javascript:void(0)" class="smobitrigger ion-navicon-round"><span>Menu</span></a>                <ul class="mobimenu">                    <?php if ($is_member) { ?>                    <?php if ($is_admin) {  ?>                    <li class="menu_admin"><a href="<?php echo G5_ADMIN_URL ?>"><b>관리자</b></a></li>                    <?php }  ?>                    <li class="menu_edit"><a href="<?php echo G5_BBS_URL ?>/member_confirm.php?url=<?php echo G5_BBS_URL ?>/register_form.php">정보수정</a></li>                    <li class="menu_logout"><a href="<?php echo G5_BBS_URL ?>/logout.php" id="snb_logout">로그아웃</a></li>                    <?php } else { ?>                    <li class="menu_login"><a href="<?php echo G5_BBS_URL ?>/login.php" id="snb_login">로그인</a></li>                    <?php } ?>                    <?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++) {                ?>                    <li class="gnb_1dli" style="z-index:<?php echo $gnb_zindex--; ?>">                        <?php                        $submenus = '';                        $sql2 = " select *                                    from {$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); $k++) {                            if($k == 0)                               $submenus .= '<button type="button" class="gnb_op">하위메뉴</button><ul class="gnb_2dul">'.PHP_EOL;                            $submenus .= '<li class="gnb_2dli"><a href="'.$row2['me_link'].'" target="_'.$row2['me_target'].'" class="gnb_2da">'.$row2['me_name'].'</a></li>'.PHP_EOL;                        }                        if($k > 0)                            $submenus .= '</ul>'.PHP_EOL;                        if($submenus)                            $gnb_class = 'gnb_1da gnb_bg';                        else                            $gnb_class = 'gnb_1da';                        ?>                        <a href="<?php echo $row['me_link']; ?>" target="_<?php echo $row['me_target']; ?>" class="<?php echo $gnb_class; ?>"><?php echo $row['me_name'] ?></a>                        <?php echo $submenus; ?>                    </li>                <?php                }                if ($i == 0) {  ?>                    <li id="gnb_empty">메뉴 준비 중입니다.<?php if ($is_admin) { ?> <br><a href="<?php echo G5_ADMIN_URL; ?>/menu_list.php">관리자모드 &gt; 환경설정 &gt; 메뉴설정</a>에서 설정하세요.<?php } ?></li>                <?php } ?>                </ul>            </nav>        </div>    </div></header><script>jQuery(document).ready(function($) {    $(".smobitrigger").smplmnu();});$(function(){    $(".gnb_op").click(function(){        $(this).next().slideToggle(300).siblings(".gnb_2dul").slideUp("slow");    });    $("#wrapper").on("click", function() {        $(".gnb_2dul").fadeOut();    });});</script>