Here is a quote from IceFrog about Dota 6.60 Item Layouts:-
Here is a preview of the new recipe shop layout based on the emails I got. The goals are both to make room for the recently added items and more importantly to organize them in a manner that makes correctly guessing where an item is an easy task for both existing and new players alike.
I know none of us like to relearn item layouts, but this is a good thing to do for the long run. Take some time to review it and give me your feedback. Thanks for everyone that has already emailed me their ideas on this.
Also here is the Image of Shop Layouts (originally posted by IceFrog).