How to create a column combination?

I have this matrix:

A=[1 1 1; 2 2 2]

And I want to create the following matrix:

A=[1 1 1; 1 1 2; 1 2 1; 1 2 2; 2 1 1; 2 1 2; 2 2 1; 2 2 2]

Is there any function similar to nshoosek?

[Jan]

What is the wanted output for [1,2,3; 4,5,6] ?