Put multiple show/hide divs within another show/hide div in Javascript

I'm trying to create a code that will allow me to put a show/hide div inside of another show/hide div but when I click the second div (the show/hide div located inside of the other show/hide dive) it makes the other copied divs in the other colums collapse also and when I click the button the buttons that drop down from the first div it also makes everything else collapse. How do I make it so that it each column drop down individually when clicked and how do I make it so that when the buttons are clicked in the second div it makes another set of div buttons drop down? I'm new so go easy.

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