Edit the Footer Text in WordPress
Navigate to Appearance > Edit > footer.php (check to the right side of the window), you may not see this file, which means you don’t have a Child Theme installed or you don’t have the footer.php file in your Child Theme.
To create and/or install a child theme, see the below post:
Once you have your child theme installed, you only need to edit the text between the echo ‘string’ , as seen below:
The Divi WordPress Theme allows you to edit the footer text from the customization screen, without the need to edit php code in the editor.