I have a table that have subheaders and each subheader with rows of items
below them.
I wanted to sort all subitems from all subheaders according to value (in one
column); and have each subitem link to the subheader as label for that
particular item.

I guess what I need to do is link a cluster of items to it subheader; so
when I sort each item will include the subheader as label to show what
subheader it came from.