card.html.twig

{# ZmCardBundle:Card:card.html.twig #}

{% extends 'ZmCardBundle::layout.html.twig' %}

{% block content %}
    {# ... #}
    
    {{ card|raw }}
    
    {# ... #}
{% endblock %}

ShowCardController.php

<?php
# In a controller

$cardTemplateID = // Some logic to get this identifier
$infos          = // Idem for user infos
$links          = // Idem for links

$HTMLCard = $this->renderView('ZmCardStorageBundle:Cards:' . $cardTemplateID . '.html.twig', array(
    'infos' => $infos,
    'links' => $links
));

return $this->render('ZmCardBundle:Card:card.html.twig', array(
    'card' => $HTMLCard,
    // ...
));