Mirrored categories in single matrix

Hi,

Is it possible to have a category ‘mirrored’ within one matrix so that it appears twice (or alternatively, can two categories within one matrix be linked so that they have the same items).

eg.

….A1 A2 A3 [A]
A1
A2
A3

[A_copy]

I can link categories between matrixes with ctrl-drag (but not within the same matrix). I can also copy a category, but it doesn’t link the old category, so that if I add items to the old category they don’t also add to the new.

Thanks,

Andrew.