bootstrap accordion-menu

bootstrap accordion-menu  架構

參考網站：http://kkbruce.tw/Bootstrap/JavaScript#collapse

<div class="accordion" id="menu_block_1">
 <div class="accordion-group">
  <div class="accordion-heading">
    <a class="accordion-toggle collapsed" data-toggle="collapse" data-parent="#menu_block_1" href="#menu_sn_1">伸縮選單1</a>
  </div>
  <div id="menu_sn_1" class="accordion-body in collapse">
   <div class="accordion-inner">
            <ul>
                <li>第一層21</li>
                <li>第一層22</li>
                <li>第一層2</li>
            </ul>
   </div>
  </div>
 </div>
 <div class="accordion-group">
  <div class="accordion-heading">
    <a class="accordion-toggle" data-toggle="collapse" data-parent="#menu_block_1" href="#menu_sn_2">伸縮選單2</a>
  </div>
  <div id="menu_sn_2" class="accordion-body in collapse">
   <div class="accordion-inner">
            <ul>
                <li>第一層21</li>
                <li>第一層22</li>
                <li>第一層2</li>
            </ul>
   </div>
  </div>
 </div>
</div>