Dropdown - Display Menu Items Under Categories

I am using a drop down menu for a website I'm working on to display menu items under categories. I'm using the same code to do this on two different pages with the actual content of the menu's loading from a MySQL database using PHP scripts. [URL] On the menu.php page I left the code below in the mix which drops down the first category listed on the left. On the seasonal.php page I took the code below out and it no longer drops down any menu by default when the page is loaded. What I'd like to do is drop down nothing initially when the page is loaded but if someone opens up the "Cupcakes" category and clicks on an item it would keep that category open when it loads the item details in the center column. If you need to see more code let me know!

[Code]...