  <i class="fa fa-chevron-up"></i>
                            </a>
                            <a class="dropdown-toggle" data-toggle="dropdown" href="javascript:;">
                                <i class="fa fa-wrench"></i>
                            </a>
                            <ul class="dropdown-menu dropdown-user">
                                <li><a href="javascript:;">选项1</a>
                                </li>
                                <li><a href="javascript:;">选项2</a>
  