<div id="expand">

{exp:channel:category_archive channel="faq"}
    {categories}
            <h2>{category_name}</h2>
                                                     
        {exp:channel:entries channel="faq" category="{category_id}" dynamic="off"}
            <a class="expander" href="#" rel="hidden{absolute_count}">{faq_question}</a>
            <div class="hidden-text" id="hidden{absolute_count}">{faq_answer}</div>
        {/exp:channel:entries}

    {/categories}
{/exp:channel:category_archive} 

</div><!--/expand-->