토글 닫기가 안됩니다. 도와주세요 ㅠㅠ

<div id="btn_side">            <button type="button" id="side_mn_btn"><a href="#"><span class="sound_only"> 메뉴 열기</span></a></button>			</div>			 <div id="side_menu">            <div class="side_close"><button type="button">닫기</button></div>            <div class="side_wr add_side_wr">                <aside id="isroll_wrap" class="side_inner_rel">                    <div class="side_inner_abs">                        <nav class="side_menu">                            <ul>                                <?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="mu_title">                                    <?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="sub_toggle">하위메뉴</button>'.PHP_EOL;                                            $submenus .= '<ul class="sub_menu">'.PHP_EOL;                                        }                                         $submenus .= '<li><a href="'.$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 = 'sd_cl';                                    else                                        $gnb_class = 'sd_cl';                                    ?>                                    <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="side_menu_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>                </aside>            </div>        </div>		</div>

//사이드 메뉴var $btn_side = $("#btn_side"),    $side_menu = $("#side_menu"),    $side_wr = $("#side_menu .side_wr"),    side_obj = { my : {} },    is_trans_sup = ''; $side_wr.css({"right":"-280px"});   //초기화 side_obj.destory = function(){    if( !is_trans_sup ) return;    side_obj.my.destroy();}side_obj.refresh = function(){    if( !is_trans_sup ) return;    side_obj.my.refresh();} function iscroll_loaded() {    if( is_trans_sup ){        $side_wr.removeClass("add_side_wr");        side_obj.my = new IScroll('#isroll_wrap', { bounceTime : 400, mouseWheel: true, click: true, hScroll:false });    }} $btn_side.on("click", function() {    if (!$(this).data('toggle_enable')) {        $(this).data('toggle_enable', true);        $side_menu.show();        $side_wr.animate({"right": "0px"}, 200, function(){            iscroll_loaded();            height_update($(this));        });    } else {        remove_side_data();    }}); $(document).on("click", ".side_close", function(e){    if ( !$(e.target).closest("#btn_side").length && $btn_side.data('toggle_enable') ){        remove_side_data();    }}) function height_update(target){    var side_wr_height = target.height();    $("body").css({"min-height":side_wr_height+"px"}).addClass("over_hidden");} function remove_side_data(){    $btn_side.data('toggle_enable', false);    $side_wr.animate({"right": "-280px"}, 160, function(){        $side_menu.hide();        $("body").removeClass("over_hidden").css({"min-height":""});    });} $("#side_menu .side_wr").on("clickoutside", function(e){    //if ( !$(e.target).is('#btn_side *, #btn_side') ){    if ( !$(e.target).closest("#btn_side").length && $btn_side.data('toggle_enable') ){        remove_side_data();    }}); // 서브메뉴 열기$(function (){    $(".sub_toggle").on("click", function() {        var $this = $(this);        $sub_ul = $(this).closest("li").children("ul.sub_menu");         if($sub_ul.size() > 0) {            var txt = $this.text();             if($sub_ul.is(":visible")) {                txt = txt.replace(/닫기$/, "열기");                $this                    .removeClass("sd_cl")                    .text(txt);            } else {                txt = txt.replace(/열기$/, "닫기");                $this                    .addClass("sd_cl")                    .text(txt);            }             $sub_ul.toggle();        }    });});</script>