I have extensive knowledge of zurb foundations, i do have a couple questions before hand so that I can make sure I do this right. first why are you using bootstraps and foundations. also what version of foundations is deployed usually i can tell however I see you only include minified versions of the foundation pages. that being said if the general layout is designed with bootstraps i would recommend you use bootstraps to handle your drop downs, or if the site is made with foundations, what parts do you need bootstraps for (i dont know of many features that bootstraps offers that foundations doesnt).