          <a class="collapse-link">
                                <i class="fa fa-chevron-up"></i>
                            </a>
                            <a class="dropdown-toggle" data-toggle="dropdown" href="#">
                                <i class="fa fa-wrench"></i>
                            </a>
                            <ul class="dropdown-menu dropdown-user">
                                <li><a href="#">选项 01</a>
                                </li>
                           