[MissKalunji]

create a plugin name the way you want in member_complete

then paste this

{ 
if (!is_object($bbcode_parser)) 
{ 
	require_once(DIR . '/includes/class_bbcode.php'); 
	$bbcode_parser =& new vB_BbCodeParser($vbulletin, fetch_tag_list()); 
} 
$userinfo['field1'] = $bbcode_parser->parse($userinfo['field1'],0, true); 
}

just change the field number to what u want and repeat the step for each field u wanna to be able to parse bbcode