hwo to set URI router Case-insensitive ?

[eluser]RING[/eluser]
i set router in /app.../config/routes.php

Code:

$route['member(.*)'] = "member$1";
$route['(.*)'] = "home/$1";

the URL :
http://domain.com/member -->> class: Member , method:index()
http://domain.com/someword -->> class: Home , methodomeword()

but the URL like this :
http://domain.com/Member -->> class: Home , method:member()
http://domain.com/mEmber -->> class: Home , method:member()
in fact i want to access the class "Member",


hwo to set URI router Case-insensitive ?


another question:
how can i use some route setting, and i do NOT want it go into effect in any else CLASS ?