Agregue un elemento de menú personalizado usando el filtro wp_nav_menu_items

He agregado un fragmento para agregar un enlace "Perfil" al menú de navegación de mi sitio web. Mi código:

add_filter( 'wp_nav_menu_items', 'my_nav_menu_profile_link');
function my_nav_menu_profile_link($menu) {  
    if (!is_user_logged_in()){
         return $menu;
    } else {
         $user_data = bbp_get_user_profile_url( get_current_user_id() );
         $profilelink = '<li><a href="'.$user_data.'&edit" >Profile</a></li>';
         $menu = $menu . $profilelink;
         return $menu;
    }
}

Este código muestra correctamente el enlace de perfil en mi menú, pero ahora quiero mover este enlace de "perfil" como submenú de otro menú principal.

La estructura de mi menú es la siguiente:

Inicio | Mi cuenta | Categorias

Me gustaría agregar el enlace "perfil" en "Mi cuenta". ¿Alguna sugerencia para resolver este problema?

He creado estas dos funciones que puede usar para agregar elementos personalizados a un elemento de menú determinado presente en su menú (página, publicación, enlace ...).

En su caso, puede agregar estas funciones a sus functions.php y llamarlas así:

$menu_name = 'Your Menu Name';
$name_of_menu_item_to_append_to = 'My Account';
$id_of_menu_item_to_append_to =  get_wp_object_id( $name_of_menu_item_to_append_to, 'nav_menu_item' );
$new_submenu_item = array(
    'text' => 'Profile',
    'url'  => 'http://someurl.com'
);

add_subitems_to_menu( 
    $menu_name,
    $id_of_menu_item_to_append_to,
    array( $new_submenu_item ) 
);

add_subitems_to_menu ()

/**
 * Adds custom items to a navigation menu
 * Partially based on: 
 * http://teleogistic.net/2013/02/dynamically-add-items-to-a-wp_nav_menu-list/
 * 
 * @param string    $menu_name          The name or slug of the navigation menu
 * @param int       $parent_object_id   The id of the post/page, which must be present 
 *                                      in the menu, and to which we want to add subitems 
 * @param array     $subitems           The sub-items to be added to the menu, as an
 *                                      array( array( 'text' => 'foo', 'url' => '/bar') )
 */
public function add_subitems_to_menu( $menu_name, $parent_object_id, $subitems ) {
    // Don't add anything in admin area. Otherwise WP will try to display the items in the 
    // Menu editor and it won't work fine and cause strange behaviour
    if ( is_admin() ) {
        return;
    }

    // Use wp_get_nav_menu_items filter, is used by Timber to get WP menu items
    add_filter( 'wp_get_nav_menu_items', function( $items, $menu ) 
            use( $menu_name, $parent_object_id, $subitems ) {

        // If no menu found, just return the items without adding anything
        if ( $menu->name != $menu_name && $menu->slug != $menu_name ) {
            return $items;
        }

        // Find the menu item ID corresponding to the given post/page object ID
        // If no post/page found, the subitems won't have any parent (will be on 1st level)
        $parent_menu_item_id = 0;
        foreach ( $items as $item ) {
            if ( $parent_object_id == $item->object_id ) {
                $parent_menu_item_id = $item->ID;
                break;
            }
        }

        $menu_order = count( $items ) + 1;

        foreach ( $subitems as $subitem ) {
            // Create objects containing all (and only) those properties from WP_Post 
            // used by WP to create a menu item
            $items[] = (object) array(
                'ID'                => $menu_order + 1000000000, // ID that WP won't use
                'title'             => $subitem['text'],
                'url'               => $subitem['url'],
                'menu_item_parent'  => $parent_menu_item_id,
                'menu_order'        => $menu_order,
                // These are not necessary, but PHP warning will be thrown if undefined
                'type'              => '',
                'object'            => '',
                'object_id'         => '',
                'db_id'             => '',
                'classes'           => '',
            );
            $menu_order++;
        }
        return $items;
    }, 10, 2);
}

get_wp_object_id ()

 /**
 * Returns the WordPress ID of any post type or page by its title or name
 * In the case you provide an ID it will "validate" it looking for any post with that ID
 *
 * @param mixed     $post_identifier    The title, name or ID of the post/page
 * @param string    $post_type          The post type to look for (default: page)
 *
 * @return int The ID of the post/page if any, or 0
 */
public function get_wp_object_id( $post_identifier, $post_type = 'page' ) {

    $post_id = 0;

    if ( get_page_by_title( $post_identifier, OBJECT, $post_type ) ) {
        $post_id = get_page_by_title( $post_identifier, OBJECT, $post_type )->ID;
    }
    else if ( get_page_by_path( $post_identifier, OBJECT, $post_type ) ) {
        $post_id = get_page_by_path( $post_identifier, OBJECT, $post_type )->ID;
    }
    else if ( get_post( $post_identifier ) ) {
        $post_id = get_post( $post_identifier )->ID;
    }

    return $post_id;
}