Hide controller name and method name in url

[eluser]nahalem[/eluser]
Hi

I'm trying to hide controller name and method in url after anchor click on my website.
How Can I hide controller name and also method name by using these...

My httacces file, it's doesn't show index.php name in url, OK

Code:

DirectoryIndex index.php
RewriteEngine on
RewriteCond $1 !^(index\.php|images|css|js|robots\.txt|favicon\.ico)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ ./index.php/$1 [L,QSA]

my full url name:

http://www.mywebsite/controller_name/method_name/1

my routes:

$route['default_controller'] = "controller_name";
$route['controller_name\method_name\:num'] = 'diffrent_name';

pls help me...