CSS Accordion Menu Issue

I have used a modern styled web template for a single-agent real estate site. The only thing the web template I chose was lacking, was an accordion or drop-down style [login to view URL], I searched the web until I found one that suited my needs and is relatively easy to edit. I then inserted it into my template. That's when the issue became obvious. The menu look like it does in the demo, with the exception that it's not recognizing the double-columns in the menu, which I require. Since it appeared to be a conflict, I removed certain things, one at a time, until I discovered the conflict was between the bootstrap css and the menu css. I simply don't know enough about css in general and how it interacts with the HTML, to make this work. I truly like the drop-down menu that I found and I really need it to work on this site. I've included both files (separate) but zipped together. Please take a look and if you can make it work preferably within the next few hours, the project will be yours. I believe in leaving glowing feedback (just check my long history here on Freelancer), provided the job is done and it works. Please ask me any questions prior to bidding. Thank you!!