Wordpress Category Menu Integration with wp_list_pages();

Here is a bit of code that you can use to put a category dropdown menu that allows for complete customization. I have wanted to put a category drop down menu in the middle of wp_list_pages(); for a while and this does the trick for me. Basically, if you want a navigation structure like this:

About (regular page)
Category (with children)
Services (regular page)
Products (regular page)

This method also allows you to use your existing CSS for your wp_list_pages(); Meaning that you don't have to use an additional set of rules for your category menu

View Demo