Add All Products Page to Frontend Menus per Website
Multi-website management is only available in the Enterprise edition.
Once the All Products page has been enabled in the system configuration globally or per website, you can add it to a frontend menu of a particular website:
Navigate System > Websites in the main menu.
Click once on the required website to open its page.
On the website page, click Edit Frontend Menu to start editing the configuration.
Click once on the menu to which you will add the All Products page.
Click Create Menu Item on the top right of the page.
In the Title field, type in the label for the menu item.
In the URI field, specify /catalog/allproducts.
Complete the other fields as required.
Click Save on the top right of the page.
The All Products page should now become available as part of the selected menu on the website level.