bootstrap 怎么关闭tab

<div class="iframe_div_wrap">

        <!-- 此处是相关代码 -->

        <ul class="nav nav-tabs" role="tablist">

        </ul>

        <div class="tab-content" style="width:100%;">

        </div>

        <!-- 相关代码结束 -->

    </div>

var item = {'id':'1','name':'菜单管理','url':'./menuctrl.html','closable':false};

closableTab.addTab(item);