Populate Menu and SubMnu Dynamicaly frm SQLDB usng Entityfrm

Question

I want to make the dynamic menu for the my app in webforms, so i want to Populate Category and Sub-Category in my main menu Dynamically from Database using Entityframwork

 those are webforms, Sql database table names

 1) prodcategories(Cid[PrimaryKey] int,name varchar,description varchar)

 2) prodSubcategories(Subid int,name varchar,description varchar,Cid[Foreign Key] int)