Sub/Dropdown Menus – disabling top link in nav bar

Hello. No matter what theme I use, I always run across the problem of the top link in submenus. My clients want a dropdown submenu, but they don’t want a link or text in the top link that is visible in the nav bar. They just want the links hooked into the menu to be active and I can’t figure out how to disable the link for that top menu item. Can anyone please help?

My latest client’s ‘site with this problem is running on WordPress 4.3.1. (yeah, I know I gotta update, but I’m pretty sure it won’t fix the issue I’m having). The link to the ‘site is here and the menu item in question is “RF Tubes and Consumables for Trumpf? CO2 Lasers”. Thanks for any help you can give me.