[nerofix]

Okay I got it,

I've wrote a new plugin in member_start and added following code:

if ($userinfo['fieldX'])
{
if (!is_object($bbcode_parser))
{
    require_once(DIR . '/includes/class_bbcode.php');
    $bbcode_parser =& new vB_BbCodeParser($vbulletin, fetch_tag_list());
}
$userinfo['fieldX'] = $bbcode_parser->parse($userinfo['fieldX'],0, true);
}

( X = number of profile field )

Works great in vB 3.7.3