Htaccess rewrite for mobile website

We have a desktop website and a mobile website. Now we want to redirect all the mobile users from our desktop website to our mobile website. But we also want an option that user can still visit the desktop website on his mobile. The code for the options above i already have but now we want to set this for each page. So if visitor visits the page [login to view URL] that i can set in the htaccess that the visitor needs to redirect to [login to view URL]