It’s quite easy if you know how to do it, if not use this snippet:
$this->_redirect(‘adminhtml/catalog_product/edit’, array(‘id’ => $productid, ‘active_tab’ => ‘mytab’));
It works in every controller extending Mage_Adminhtml_Controller_Action
PHP, Magento, iOS and more
Something is wrong with “>” in the snippet – it is replaced with HTML entity.
yep, correcting this now