title: Drupal 7 - Programmatically switch menus on site
body: <p>In Drupal 7 I want to have a site that has distinct sections with a left navigation menu that switches based upon the page you are on. For example I want to have a top level nav that takes you to a section, and then in that section the menu is unique for it. I'm assuming I have to create a theme function in my template.php file to handle this. Can someone give me an idea of how to start coding this?</p>