PowerShell Script to Limit SharePoint Site Templates Available

Reference:

http://geekswithblogs.net/bjackett/archive/2014/03/04/powershell-script-to-limit-sharepoint-2010-or-2013-site-templates.aspx

Another Article

http://www.sharemuch.com/2011/02/10/limit-sharepoint-2010-site-templates-available-to-create-new-site/