<div id="accordion">
  <div class="" data-parent="#accordion" data-toggle="collapse" data-target="#demo">
  simple collapsible
  </div>
  <div id="demo" class="collapse">11Anim pariatur cliche reprehenderit, 3 wolf m</div>

  <div class="" data-parent="#accordion" data-toggle="collapse" data-target="#demo2">
  simple collapsible
  </div>
  <div id="demo2" class="collapse">22Anim pariatur cliche reprehenderit, 3 wolf m</div>
</div>