<div id="sidebar-wrapper">
  <ul class="sidebar-nav">
    <li class="sidebar-brand">
        <a href="#">
            Start Bootstrap
        </a>
    </li>
    <a href="#demo4" class="list-group-item list-group-item-success" data-toggle="collapse" > Fist <span class="fa arrow"></span></a>
    <div class="collapse" id="demo4">
        <a href="" class="list-group-item">Dashboard</a>
        <a href="" class="list-group-item">Shortcuts</a>
        <a href="" class="list-group-item">Overview</a>
        <a href="" class="list-group-item">Events</a>
    </div>
  </ul>
</div>