Menu Item Featured Image

Add featured image to menu iems

<?php
add_filter('wp_nav_menu_objects', 'db_menu_item_featured_image', 10, 2);

function db_menu_item_featured_image($sorted_menu_objects, $args) {

    // Check navigagtion is primary
    if ($args->theme_location != 'primary')
        return $sorted_menu_objects;
    // edit menu items
    foreach ($sorted_menu_objects as $menu_object) {
        // check post type array
        if ( in_array($menu_object->object, array('post', 'page', 'any_post_type')) ) {
            // check if Menu itme has CSS class of Image
            if ( in_array('image', $menu_object->classes ) && has_post_thumbnail($menu_object->object_id)  ) {
            // print item HTML
            $title_image = '<figure>' . get_the_post_thumbnail($menu_object->object_id, 'thumbnail') . '</figure>';
            $title_text = '<span class="menu-label">' . $menu_object->title . '</span>';
            $menu_object->title = $title_image . $title_text;
            }
        }
    }

    return $sorted_menu_objects;
}