Hiding columns based on drop down list selection

I have looked at many threads on this and cannot find a solution that will work for me.
I am trying to set up a sheduling system for my work. I have hundreds of columns that will have dates as the heading. There will be 6 columns per date to represent different shift timings.
I have a drop down box that you can pick the appropriate shift (2, 4, 6, 8, 12, 24).
When the shift is chosen, all columns that do not match the selection are hidden.

I have attached an example if anyone would be able to assist please.