How can I force the WebControl to render as a <div>? Currently, it renders as a <span> and our UI guy prefers it be a <div>. To accommodate him, I'd like to see if this is possible and if so, how it's possible.
Yes, it is definitely possible. Asp.net gives you full control over the output rendered.
Take a look at Control Adapters
The asp.net team has released many adapters for CSS friendly rendering for controls like Menu, TreeView, and FormView. Take a look at CSS friend control adapters
You can always build your own to customize the rendering as needed by your UI guy.