영카트5 제이쿼리 질문 입니다. 채택완료

</p><p><script>
$(function (){
    var $category = $("#category");</p><p>    $("#hd_ct").on("click", function() {
        $category.css("display","block");
    });</p><p>    $("#category .pop_close").on("click", function(){
        $category.css("display","none");
    });</p><p>    $("button.sub_ct_toggle").on("click", function() {
        var $this = $(this);
        $sub_ul = $(this).closest("li").children("ul.sub_cate");</p><p>        if($sub_ul.size() > 0) {
            var txt = $this.text();</p><p>            if($sub_ul.is(":visible")) {
                txt = txt.replace(/닫기$/, "열기");
                $this
                    .removeClass("ct_cl")
                    .text(txt);
            } else {
                txt = txt.replace(/열기$/, "닫기");
                $this
                    .addClass("ct_cl")
                    .text(txt);
            }</p><p>            $sub_ul.toggle();
        }
    });
});
</script>​</p><p>