Create an interactive hierarchy chart

I would like to create something similar to what is attached here. I would like for someone to create an interactive chart that I can display on my wordpress blog. I would like the chart to have two levels. The first of which would be all the genres that I have on my site (or categories). Someone visiting my site would be able to click on one of these and it would redirect him to the page of my choosing. The second level would be accessed when a visitor clicks on "House" or "Types of House". I would like the chart to open up and display the different kinds of "House" available on my site. It would be similar to a hierarchy list. The link provided here is what I currently have, but I would like to have the graphic much more visually appealing to my visitors. I would like the designer tp follow the theme of the website I have, the primary color being #ff0066. [login to view URL] Please don't hesitate to contact me if you have further questions.