groundfeel
Hi
The toolbar is a module and work own to show the items. And mega menu use the menu items. I am afraid its not so simple to hack, its custom work needs to be done for new layout of toolbar and customization for main nav.
I can share the path for both files you can customize : file "/html/mod_community_toolbar/default.php" in template "socialize".
file "/tpls/blocks/mainnav.php" in template "socialize".
file "/tpls/blocks/header.php" in template "socialize".