ary" data-value="2">Two</button>
      <button type="button" class="btn btn-primary" data-value="3">Three</button>
    </div>
  </div>
</div>

<div class="panel panel-default">
  <div class="panel-heading">Checkbox group</div>
  <div class="panel-body">
    <div id="checkbox-group" class="btn-group">
      <button type="button" class="btn btn-primary" data-value="1">One</button>
      <button type="button" class="btn btn-primary" data-value="2">Two</button>
      <button type="button" class="btn btn-primary