Redirect subdomain

[stassav]

Question: as in the panel given the administrator to make a redirect subdomain in the certain folder, instead of in the basic folder??
It is necessary to me that my subdomain sub.domen.com opened not domen.com/sub and a folder domen.com/sub/index.php and the address did not turn in domen.com/sub/index.php, and remained sub.domen.com