czyli tak ?
else if($arr['art'] == "invite") {
$modcomment = gmdate("Y-m-d") . " - Wymiana punktów (" .$arr['points']. ") na zaproszenia " .$modcomment;
mysql_query('UPDATE users SET invite = '.sqlesc($invite).', seedbonus = seedbonus - '.$arr['points'].', modcomment = '.sqlesc($modcomment).' WHERE id = '.$CURUSER['id']) or sqlerr(__FILE__, __LINE__);
}