In this tab navigation, all submenus have their "Type" property set to "Horizontal" and their "Appears - Aligned With" property set to the "Top-Left edge of the parent group". These settings are needed to create a unified look for the whole navigation while the Sticky property is also used to make sure the right submenu is visible at all times. For this demonstration the "Products" submenu appears automatically (Show Item or Group on Appear) but you can always use a different rule so this behavior matches your website needs.
Download this AllWebMenus project file.