You can change the top navigation on your site through the administration by going to Website > Menu Manager
This screen shows you a list of your current menu items and allows you to add, edit and delete them.
To add a menu item, click the Add Menu Item button at the top of the page.
To delete a menu item, simply click the Delete button next to it – you will be asked, “Are you sure you want to delete this item?,” to give you a chance to change your mind.
To edit a menu item, click the Edit button next to it.
Whenever you make a change to your menu, you need to reload it by clicking the Reload button. This will regenerate the HTML that makes up your menu.