copy the titles next to the data

hello,

Is it possible in a way to carry the sub-group titles next to the data cells?

In the attached file, I tried to explain in the red cells that what i need..

It is possible to have it with copying down a simple copy formula but this takes too much time. I tried to create a "match" formula but no hope.

Is there an easier way? can anyone help me?

thanks in advance