Two obvious methods, but neither of them may appeal to you, as they are both done "outside" the plug-in.
(1) change the title of the page to "Classes" and start the text of the page with an H2 or H3 tagged header of "Martial Arts Classes in Paris";
(2) don’t call the plug-in at all, but just use its CSS, by manually coding the menu yourself. You can start by doing a View Source on your current page with the plug-in call in place. Then edit the generated HTML to shorten any titles you don’t like.
I used the second approach to provide (one of) three menus on each page of my site.