how to alter block subject html tag?

Question

I am trying to change the <h2> tags that block.tpl.php uses to wrap <?php print $block->subject ?> to <h3> tags so that I can target them with jQuery UI Accordion. I've got the following code:

<?php
    function MYTHEME_block_view_alter(&$data, $block) {
        if($block->module == 'block' && $block->region == 'sidebar') {
            $data['subject']['#tag'] = 'h3';
        }
    }
?>

This doesn't work...I assume I'm screwing up the reference to the render element. Does $data['subject'] contain an array where the HTML tag is stored? What is the correct way to target it?

Alternatively, should I look for a way to re-write block markup so that, in the sidebar region, it renders only the <h3> and <div> required by jQuery UI Accordion? Unless there's a fantastic module for turning blocks into Accordion-ready HTML already out there, I'd rather not install another module.

Many thanks for any help!

Answer 1

You can override the block template for a particular block and can modify the html for block subject.

You can check theme suggestions for more reference.

Answer 2

You can rewrite the block output using HOOK_BLOCK_VIEW_ALTER