Adding some text below or above the mobile hamburger menu on Divi is really easy to add and edit to your liking.  With the code below simply add it to your Divi / Theme Options / Global CSS and you are done. You can change  the word MENU to anything you like, change the font size and change the color of your text. You can also change the word after to before to place the text above the Divi hamburger menu. .