{foreach from=$vehicles item="vehicle_segment"}
  {counter name="vehicle_segment" assign="vehicle_segment_index"}
  <li>
    <a href="{if $vehicle_segment.vid}{$url_dynamic}p=vehicle&amp;mode=update&amp;vid={$vehicle_segment.vid}{else}#{/if}" {if !$vehicle_segment.vid}data-toggle="collapse" data-target="#vehicle-segment-{$vehicle_segment_index}" class="collapse-toggle collapsed"{/if}>
      {$vehicle_segment.name|htmlspecialchars}
      {if !$vehicle_segment.vid}
        <span class="collapse-open">+</span>
        <span class="collapse-close">-</span>
      {/if}
    </a>
    {if !empty($vehicle_segment.children)}
      <ul id="vehicle-segment-{$vehicle_segment_index}">
        {assign var="vehicles" value=$vehicle_segment.children}
        {include file="templates/panels/includes/panel-vehicle-item.html"}
      </ul>
    {/if}
  </li>
{/foreach}