buttons in a group

Dear all,

I want to add a block with a grid repeater in which I have buttons.
I would like that each button automatically resizes according to the text included.
I also would like that each column automatically resizes according to the size of the buttons.

Apart from doing this by hand (which I cannot do for all my pages) how can I manipulate the grid repeater or the buttons (or anything else) to get my result ?

Here is what I get aligning the buttons by hand:

Thanking you in advance,
Pol