Currently when you click a menu item on top of the website, a page loads with:
<h3><%=PortalSettings.ActiveTab.TabName %> </h3> as the title. 

I want to change this to show the Menu Item.... How can this be accomplished?

For instance, you click on Membership, where the script above is showing the tabname right now, I want it to say Membership. Then I will move the TabName right above the content frame within the page.

You can render the attributes of any page in the breadcumbs like this:

PortalSettings.ActiveTab.BreadCrumbs(n).TabName

Where n =  the Level.

You might want to add a condition to prevent calling a non existing level:

<%If PortalSettings.ActiveTab.Level > (0) Then Response.Write(PortalSettings.ActiveTab.BreadCrumbs(1).TabName)%>

I have two example skins on Codeplex with much more framework attribute examples:

https://demoskins.codeplex.com/releases