How to make it work with theme's submission page?

Hello,

This plugin is really great and extremely useful. As noted in my review works fine, at least as long as you use WP admin pages.

My problem is that I work on a Directory theme that offers custom pages for users to submit their own listing and it doesn’t work within those pages when selecting a category for a listing. That is of course understandable but I just wonder whether there would be a turnaround for this. Any clues?

Thanks.

https://wordpress.org/plugins/parent-category-toggler/