Is there a way that I can hide items and information items in the left side navigation only on certain pages?

We have our web store setup to show the items in a particular category in the left side navigation through Setup>Website>Themes, but on the non store pages, like about us, shipping, etc, I'd like to be able to hide the info items in the left side navigation because some of them become quite long.

I've tried setting up a Tag Substitution for that particular category and trying to do it with CSS, using display: none, etc, but NetSuite's navigation code doesn't get specific enough to allow me to specify children at a certain level (WHY IS THE NAVIGATION NOT JUST A LIST!!??? :h_a_w:), so I end up hiding all of the categories that aren't the current one because they all have the same class.