Source: http://www.elegantthemes.com/blog/tips-tricks/9-useful-divi-css-snippets-you-can-add-to-epanel-in-seconds

You can also do this by creating a header with the theme builder and a menu module, by placing that module in a small column.

@media only screen and ( min-width:980px ) {
#et_mobile_nav_menu { display:block }
#top-menu-nav { display:none; }
}
/**change these settings if you want to style it**/
.mobile_menu_bar:before {
content: "\61";
font-size: 32px;
left: 0;
position: relative;
top: 0;
cursor: pointer;
}
}Code language: CSS (css)