Here’s my Wayfinder call in all its complexity...
[!Wayfinder? &startId=`0`!]
And for the submenus, it’s all in the CSS:
#dropmenu ul ul { display:none; }
#dropmenu li.active ul { display:block; }
If you do a View Source on the page, you’ll see all the items are there, they just aren’t being displayed by the browser.