change navigation on website

We have a custom coded website that required a custom designed navigation. The current coder however says it is impossible to have this type of navigation to work with the custom coding. We need someone that can do this and use our preferred navigation on our website. The jpg for the "open" navigation is attached. A working link of such a navigation you can find here : [login to view URL] Second part of this job is to implement this code : [login to view URL] [login to view URL] [login to view URL] Tell us if it is possible to work on the current website and that it can be done in combination with other products before we proceed. thank you, Seth