<span class="co-checkable-menu">
  <span class="dropdown" style="text-align: left;">
    <span class="btn btn-default"  data-toggle="dropdown">
        <span class="co-checkable-menu-state"
              ng-class="getClass(controller.items, controller.checked)"
              ng-click="toggleItems($event)">
        </span>
        <span class="caret"></span>
    </span>
    <ul class="dropdown-menu" ng-transclude></ul>
  </span>
</span>