Используем следующий код:



Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);
 
$staticBlock = array(
                'title' => 'My Static Block',
                'identifier' => 'my-static-block',
                'content' => 'Lorem ipsum',
                'is_active' => 1,
                'stores' => array(1)
                );
 
Mage::getModel('cms/block')->setData($staticBlock)->save();