$kimdan = '5';
mysql_query("INSERT INTO `cms_mail` SET
    `user_id` = '$kimdan',
    `from_id` = '" . $usid . "',
    `text` = '" . mysql_real_escape_string($system) . "',
    `time` = '" . time() . "',
    `sys` = '1',
    `them` = '" . mysql_real_escape_string($theme) . "'
");