[eluser]CroNiX[/eluser]
What's the question? It's already in the form of a dropdown according to your output. What are you expecting it or wanting it to do?
An array of Key => Values will produce a normal dropdown with the Key being the value sent and the Value being the text shown in the dropdown option. A multidimensional array will create a dropdown with option groups. If the Key is another array, that key will be the option group label and it's array will produce the options for that group, just like you have above.
