Reescribir bloque de formulario

gistfile1.txt

{# se pone _ luego el id del campo y por ultimo label, widget, errors o row #}
{% block _dinamico_bundle_contactbundle_message_email_errors %}

{% endblock %}


As of Symfony 2.1 (it may work as well for 2.0 but not sure) to apply theme for collection you do this way:

Lets say we have a collection of products (we have multiple Product entities)

Controller:

    $repository = $this->getDoctrine()->getRepository('ExampleBundle:Product');
    $products = $repository->findAll();

    $productCollection = new Products;

    foreach ($products as $product) {
        $productCollection->getProducts()->add($product);
    }

    $collection = $this->createForm(new ProductsType, $productCollection);

    return $this->render('ExampleBundle:Default:index.html.twig', array(
        'collection' => $collection->createView()
            ));        
Your theme can look like this:

{% block _productsType_products_entry_name_row %}
    <div class="yourDivName">{{ block('form_widget') }}</div>
{% endblock %}
{% block _productsType_products_entry_description_row %}
    <div class="yourDivDescription">{{ block('form_widget') }}</div>
{% endblock %}
The trick is with "entry" where twig will do the job for you to apply above changes to each row and for each field you specify

Hope that helps!