Custom snippet for renaming the MainWP Dashboard WP Admin menu header

custom-mainwp-menu-header.php

<?php 

// Add the following code snippet to the functions.php file of the MainWP Customisations plugin
// Download MainWP Customisations here: https://github.com/mainwp/mainwp-customisations
// More about the plugin: https://mainwp.com/mainwp-customisations/

add_action( 'admin_head', 'mycustom_menu_admin_head' );
function mycustom_menu_admin_head() {
    global $menu;
    foreach( $menu as &$item ) {
        if ( $item[2] == 'mainwp_tab' ) {
             $item[0] = 'Demo Header';
          break;
        }
    }
}

?>