How to modify Menu and sub-menu items in Bootstrap template?

1. Firstly, go to  
 2. Login with your username and password of FTP.
 3. Once logged in, click File manager and make sure web root is selected.
 4. Click go which will redirect to main folder public_html.
 5. Click file where your want menu to be changed. For example index.php
 6. Click Edit and edit again.
 7. Now look for your menu item links
 8. If you find the one which has sub-menu it will surely be located after the menu item.
 9. Change it as you want and click Save changes in top right corner.
 10. That's it. Changes should be affected.