How do I collapse multiple columns *that are not in a connecting selection" as a single group?

[cluelessintern]

I have many columns (budget, forecast, and variance) for each month and quarter. I need to collapse and expand the variance columns as one group. How do I do this?

 

[Brittain12]

you have to change the columns that you want to hide.

What are the columns that you want to hide???