How can you make a menu with all categories and all the posts

hey maordany

https://msdn.microsoft.com/en-us/library/mt476049(v=vs.110).aspx ,i saw the website and their functionality for their menu and their tree menu, so i can say that you have to try with your left sidebar in dashboard ,in left sidebar you HAVE TO create menu looks like drop dawn it will be work
1) create new menu with you r required tree list
2)put those menu in left sidebar widget
hope it’ll be work