<div class="list-group">
  <ng-repeat ng-repeat="theme in themes">
    <h4 class="list-group-item">
      {{ theme.name }}
    </h4>
    <ng-repeat ng-repeat="(eid,exercice) in theme.exercices">
      <a class="list-group-item" href="{{ my.exercices[eid].video_uri }}">{{ exercice.title }}</a>
    </ng-repeat>
  </ng-repeat>
</div>
