[FIX] Extra div closing tags broke tab content display.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49013 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Use plural ("categories") for button text.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49014 b456876b-0849-0410-b77d-98878d47e9d5