You should find file functions.options.php (wp-content\themes\oceanplaza\admin\functions) and change to your name the field of theme options, for example, About us to Technology in the line
$of_options = array("name" => "About Us",
like at the screenshot
then find file admin-style.css (\wp-content\themes\oceanplaza\admin\assets\css) and change class to the new name of a section.
You will get next result