Add required link attributes to WordPress menu item for a MonsterLink.

wp-menu-monsterlink.php

<?php
  /**
   * Plugin Name: OptinMonster - Add MonsterLink to Menu Item
   * Plugin URI: http://optinmonster.com/
   * Description: Adds the required link attributes to menu item #13757 for a MonsterLink that triggers the pbjdmwn4elhriejj optin.
   * Version: 1.0.0
   * Author: Erica Franz
   * Author URI: https://fatpony.me/
   * License: GPL2
   */
 
  defined( 'ABSPATH' ) or die( 'No jellyfish!' );
 
  //* Filter wp_footer
  add_action( 'wp_footer', 'ekf_om_menu_item_monsterlink' );
  
  //* Remove all optins on mobile
  function ekf_om_menu_item_monsterlink() {
      echo "<script type='text/javascript'>
        jQuery(document).ready(function($){
            $('#nav-menu-item-15757 a').attr('class', 'manual-optin-trigger');
            $('#nav-menu-item-15757 a').attr('data-optin-slug', 'pbjdmwn4elhriejj');
        });
      </script>";
  }
 ?>