Menu 
Main menu 

- Go to Admin -> Appearance -> Menus (select Main menu)
 

Drag and drop to change menu items.

Header menu 

- Go to Admin -> Appearance -> Menus (select Header menu)
 

Footer menus 

- Go to Admin -> Appearance -> Menus (modify menu Company, Information & Product categories)
 

- You can change or remove those menus in Admin -> Appearance -> Widgets.
 

