Content Query web part set number of column with Items after group by item?

Hello,

      How can I set number of column with items list after group by item?

      Example with the below picture.

              1. I'm set number of column = 1 and data show is correct but items under group show 1 column as setting but I need set number of column of Items list =3. (Can do it?)

              Group by ReportGroup (BSG,Budget).

              Please suggest me for set number of column of items list difference with group name.

Thank you very much.

Aor.