I have 5 buttons across the top of the page which organise my content into various logical groups such as Home, Elementary, MiddleSchool, HighSchool. When a user clicks a button, for example 'Elementary' I want MultiMenu01, which is responsible for displaying Elementary submenus to be visible and when the user presses 'MiddleSchool' I want multiMenu01 to be hidden and multiMenu02 to become visible in exactly the same location as multiMenu01. And so on.....
Is there a smarty variable for controlling whether a particular multiMenu block is hidden or visible - something like $block.multiMenu.01.hidden == true
I cannot find any reference to properties such as above. Is there a secret listing showing all the XOOPS smarty variables(particularly the block variables) somewhere?

Which multimenu version are you using?

version 1.8

You may have a go with the latest version multimenu 2.0, where you can create as much menus as you want, and thus, attribute links to each and everyone you have created.

Note this version is still in beta, but functional anyway.