HOW TO HIDE THE WP-ADMIN URL

Im just starting a new website(totally newbie here). Can anybody tell me how to hide the "wp-admin" for example "www.domain.com/wp-admin" EVEN AFTER they have logged in to admin panel. Means that after they logged in, i dont want them to see http://www.domain.com/wp-admin. I dont want members or author know that im using wordpress. Any suggestion?