horizontal treeview?

horizontal treeview?

Hi
I was wondering if anyone could help me out here. I've been using the treeview plugin and it's been working fine. I was wondering if there was any way to get the indexes in the tree to be positioned horizontally instead of vertically?
The indexes contain a Jquery-ui tab widget at the moment which I am resizing to make them smaller.
If I float them left then add padding the tab widgets just get wider which I don;t want.
What I would like is to be able to expand items in the tree so that they are next to each other and not below each other. Is this possible? are there any plugins that might help with this?

I was considering putting a <div> at the end of th index item and padding that <div> would that idea perhaps put me on the right track?
I am pretty new to javascript and any help would be appreciated thanks