To only show the "active" section that a visitor is in on your left navigation menu, follow these easy steps:
- Click on the "Settings" link in the main menu of your Administrative Interface.
- Click on the "Edit" link in the top right hand corner of the section entitled "Design Layout" in the tab entitled "Site Design/Layout".
- Change the field entitled "Show All Sections in Left Menu" to "No".
- Click the "Update" button.