使用Kohana Framework将www重定向到非www

I'm using Kohana setup to rewrite index.php for clean URLs. I have the follow htaccess file which works fine for the root domain. However if someone tries going to www.domain.com/learn it will redirect to domain.com/index.php/learn which is incorrect. It should redirect to domain.com/learnI'm using Kohana setup to rewrite index.php for