     <a href="" class="list-group-item">Subitem 1</a>
                      <a href="" class="list-group-item">Subitem 2</a>
                      <a href="" class="list-group-item">Subitem 3</a>
                    </li>
                </li>
              </ul>
          </div>
          <div class="col-xs-12 col-sm-9 content">
            <div class="panel panel-default">
              <div class="panel-heading">
                <h3 class="panel-title"><a href="javascript:void(0);" class="toggle-sidebar"