[Ljusya]

thanks, so i describe all my steps
i create file /includes/class_myaddon_seo.php with code

PHP Code:

class vB_Friendly_Url_Category extends vB_Friendly_Url_Paged
{
    protected $idvar = 'cat';
    protected $idkey = 'id';
                protected $titlekey = 'catname';
    protected $ignorelist = array('cat','product');
    protected $script = 'myaddon.php';
    protected $rewrite_segment = 'category';
} 


create plugin on hook friendlyurl_resolve_class

PHP Code:

include_once('./includes/class_myaddon_seo.php'); 


in myaddon.php define

PHP Code:

define('FRIENDLY_URL_LINK', 'articles'); 


add in .htaccess rules

PHP Code:

ReWriteRule ^category/.* myaddon.php [QSA] 


And successfully generate links for example

PHP Code:

$url=$vbulletin->options['bburl'].'/'.fetch_seo_url('category',$categorydata); 


And links look as http://mysite.net/category/id-categoryname
All works good!