Не выводятся дополнительные поля при выборе категории

$cats .= $categories_list;
        $cats .= "</select>";

        $tpl->set( '{bbcode}', $bb_code );
        if(intval($_REQUEST['sel_cat']) > 0 AND isset($cat_info[$_REQUEST['sel_cat']]))
            $tpl->set( '{category}', '<b>'.$cat_info[$_REQUEST['sel_cat']]['name'].'</b><input type="hidden" onload="onCategoryChange(this)" name="catlist[]" id="category" value="'.$_REQUEST['sel_cat'].'">' );
        else
            $tpl->set( '{category}', $cats );

RewriteRule ^addnews.html$ index.php?do=addnews [L]
RewriteRule ^add_request.html$ index.php?do=addnews&sel_cat=25 [L]
RewriteRule ^add_req.html$ index.php?do=addnews&sel_cat=24 [L]