ynh_extension_meeo/templates/absences.twig

<div id="accordion" class="panel-group" role="tablist" aria-multiselectable="true">
{% for identifier, group in groups %}
  <div class="panel">
    <button id="head_{{ identifier }}" class="panel-heading collapsed" data-parent="#accordion" data-target="#{{ identifier }}" data-toggle="collapse" aria-expanded="false">
      <h4 class="panel-title">{{ group['nom'] }}</h4>
    </button>
    <div id="{{ identifier }}" class="panel-collapse collapse" aria-expanded="false">
      <div class="panel-body">
        <ul>
          {% for entry in group['entries'] %}
            <li>
              <div>
                {{ entry['bf_date_debut_evenement'] }}
                <p>{{ entry['bf_commentaire'] }}</p>
              </div>
            </li>
          {% endfor %}
        </ul>
      </div>
    </div>
  </div>
{% endfor %}
</div>