引导下拉列表中的图像

Question

我无法在下拉框中选择一个下拉列表，其中包含下拉列表中的图片如何解决此问题jsfiddle

  <div class="form-group">
                <label class="col-md-4 control-label">Do you belong to the part of organisation ?</label>  
                <div class="col-md-4 selectContainer">
                   <div class="btn-group">
                       <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                         <img src="http://lorempixel.com/75/50/abstract/">
                         Select
                         <span class="glyphicon glyphicon-chevron-down"></span>
                       </button>

                       <ul class="dropdown-menu">
                         <li class="dropdown-header">Select a group </li>
                         <li>
                           <a href="#" title="1"><img src="http://lorempixel.com/75/50/abstract/">women entrepreneurship branch</a>
                         </li>
                         <li>
                           <a href="#" title="1"><img src="http://lorempixel.com/75/50/abstract/">Tamilnadu Corporation for Development of Women</a>
                         </li>
                         <li>
                           <a href="#" title=""><img src="http://lorempixel.com/75/50/abstract/">Mompreneur Circle</a>
                         </li>

                       </ul>
                     </div>
                </div>
            </div>