问如何在引导选项卡中添加关闭图标？

.close {
    font-size: 20px;
    font-weight: bold;
    line-height: 18px;
    color: #000000;
    text-shadow: 0 1px 0 #ffffff;
    opacity: 0.2;
    filter: alpha(opacity=20);
    text-decoration: none;
    display:inline;
}
.close:hover {
    display:inline;
    color: #000000;
    text-decoration: none;
    opacity: 0.4;
    filter: alpha(opacity=40);
    cursor: pointer;
}

<a id="user-list-tab-li" style="display:inline;" href="#user-list-tab-pane">The tab</a> 
<span class="close">×</span>