[ReCom]

I spent about 30 minutes cracking this up:

PHP Code:

<?php
require_once('global.php');
require_once(DIR . '/includes/adminfunctions.php');

$vbulletin->input->clean_gpc('g', 'enable', TYPE_BOOL);
$enable = $vbulletin->GPC['enable'];

$sql = "SELECT `forumid`, `options` FROM `".TABLE_PREFIX."forum` WHERE `forumid` = '57'";
$res = $vbulletin->db->query_read_slave($sql);
while ($row = $vbulletin->db->fetch_array($res))
{
  $forumid = $row['forumid'];
  $optionbits = $row['options'];
  $newoptionbits = ($enable? $optionbits | 3 : $optionbits - ($optionbits & 3));
  $vbulletin->db->query_write("UPDATE `".TABLE_PREFIX."forum` SET `options` = '$newoptionbits' WHERE `forumid` = '$forumid'");
}

build_forum_permissions();
?>

Modify the SQL query $sql to put the forumids you are interested in. Then save as forumswitch.php in your vbulletin directory.

Set two Scheduled Tasks in AdminCP that call forumswitch.php?enable=0 and forumswitch.php?enable=1 respectively.