menu no click on parent

Hello! I’m setting up a menu on my site, but I don’t know how to make the parents for the dropdown non clickable. (The parents are any pages with submenus, like the letters in the menu for example). I only set zip the parents as dummy blank pages because they’re not meant to be clicked on, but I want to eliminate the possibility of someone stumbling on them if they are clicked on.

I noticed that the mobile version of the site doesn’t allow you to click on the parents, clicking just opens the child menu like it’s supposed to. But the desktop version allows clicking which brings you to the blank dead pages. How do I eliminate the ability to click on the parent pages?

The page I need help with: [log in to see the link]