You can show different menus to logged in and logged out users, like so:
Doing this with CSS is pretty easy!
Step 1: Enable CSS Classes on Menu Items
Go to Appearance > Menus, click Screen Options in the top right and check CSS Classes. You’ll now be able to add custom classes to any menu item.
Step 2: Add “logged-in” and “logged-out” to the Menu Items
To give logged in users and logged out users different menu options, first add all the menu items you want. Then add “logged-in” to the class box for the menu items you want to show for logged in users and “logged-out” to the menu items you want to be hidden upon login.
Step 3: Conditionally Change the display via CSS
In Genesis, when a user is logged in it adds the class “logged-in” to the body. (Hint: If your theme doesn’t have this already, you can use the body class filter to add it.)
Add this code to the bottom of you styles.css file and voila!