In any Information System there are directories, so the development is necessary to solve the problem of how you store it.
Some Information Systems prefer to keep the background information as a whole in the tree. If this way is taken away a lot of working space on the navigation bar, and is piling up, so it should not be done.
Instead, you need to make a reference similar to other sections in the style envisaged at the moment:
This approach saves space in the navigation pane, and no need to scroll down the page. If the number of directories is too large – enough to competently break them into sections. When you click on one of the guides takes you to a list form: