rewrite mod

[eluser]nhantam[/eluser]
I have controller mycontroller

when I write my browser: http://www.mydomain.com/mycontroller is OK
but:
if I only write my browser: mydomain.com/mycontroller
then browser appear allow: http://www.mydomain.com/index.php/mycontroller

Could you help. How do I hidden "index.php" ?

My htaccess:

Code:

RewriteCond $1 !^(index\.php|images|robots\.txt)
RewriteRule ^(.*)$ index.php/$1 [L]

RewriteCond %{HTTP_HOST} ^mydomain.com
RewriteRule ^(.*)$ http://www.mydomain.com/$1 [L,R=301]