tab.html.twig

<ul class="nav nav-tabs">
    {% for tab in tabs %}
    <li><a id="{{ tab.id }}_tab" href="{{ tab.url }}" data-toggle="tab">{{ tab.title }}</a></li>
    {% endfor %}
</ul>

<!-- Tab panes -->
<div class="tab-content">
    {% for tab in tabs %}
        <div class="tab-pane" id="{{ tab.id }}_content">
            {{ tab.content }}
        </div>
    {% endfor %}
</div>

TwigExtension

public function getFunctions() {
	return array(
		'tabs' => new \Twig_Function_Method($this, 'toTabs', array('needs_environment' => true))
	);
}

public function toTabs(\Twig_Environment $environment, array $data) {
	return $environment->render('MyBundle:Layout:tabs.html.twig', array('tabs' => $data));
}

usage

<div class="row">
{{ tabs(tabs)|raw }}
</div>