My Software Centre has crashed. Then I don't have any other ways to install packages. Please tell me how to install main menu (editor) using the terminal. I need main menu (editor) for editing my menu and installing other softwares in my Ubuntu 13.04 desktop.
You can install the menu editor from command line with
As I said in my comment, that will not enable you to install software in a graphical mode.
You should fix the problem you have with Ubuntu Software Center - I suppose you will run into some error when you execute above commands. If yes edit your question to show us eventual error messages.