Как сделать кнопку на закрытие активного tab bootstrap?

<ul class="nav nav-pills">
  <li role="presentation" class="active"><a href="#">Home</a></li>
  <li role="presentation"><a href="#">Profile</a></li>
  <li class="alert" role="presentation">
    <a href="#">
      <button type="button" class="close pull-right" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
      Messages
    </a>
  </li>
</ul>