I really don't get what you mean but i am going to try.
PHP Code:
$db->query_write("UPDATE setting SET value = '" . $db->escape_string($vbulletin->options['tum']) . "' WHERE varname = 'tum'");
require_once(DIR . '/includes/adminfunctions_options.php');
$vbulletin->options = build_options();
Or
PHP Code:
$tume = $vbulletin->option['tum'];
You don't need quotes around the vbulletin options part and if you want it in a array.
PHP Code:
$tume = array($vbulletin->options['tum']);