<select name='{{ widget.name }}'{% include 'fobi/django/forms/widgets/inverse_attrs.html' %}>{% for group_name, group_choices, group_index in widget.optgroups %}{% if group_name %}
  <optgroup label='{{ group_name }}'>{% endif %}{% for option in group_choices %}
  {% include option.template_name with widget=option %}{% endfor %}{% if group_name %}
  </optgroup>{% endif %}{% endfor %}
</select>
