Как сделать дополнительные BB коды в форуме

$usr['avatar'] = usrImage($usr['id'], 'big');

$smarty->display('com_users_messages_add.tpl');

 
        $usr['avatar'] = usrImage($usr['id'], 'big');
        $bb_toolbar = cmsPage::getBBCodeToolbar('message');
        $bb_smiles = cmsPage::getSmilesPanel('message');
        $id_admin = $inCore->userIsAdmin($inUser->id);
 
        $smarty = $inCore->initSmarty('components', 'com_users_messages_add.tpl');
        $smarty->assign('msg', $msg);
        $smarty->assign('usr', $usr);
        $smarty->assign('is_reply_user', $is_reply_user);
        $smarty->assign('bbcodetoolbar', $bb_toolbar);
        $smarty->assign('smilestoolbar', $bb_smiles);
        $smarty->assign('id_admin', $id_admin);
        $smarty->display('com_users_messages_add.tpl');