Changing Admin Menu Labels

Here’s the process to change the labels (I changed posts to “contacts” in my example)

function change_post_menu_label() {
    global $menu;
    global $submenu;
    $menu[5][0] = 'Contacts';
    $submenu['edit.php'][5][0] = 'Contacts';
    $submenu['edit.php'][10][0] = 'Add Contacts';
    $submenu['edit.php'][15][0] = 'Status'; // Change name for categories
    $submenu['edit.php'][16][0] = 'Labels'; // Change name for tags
    echo '';
}

function change_post_object_label() {
        global $wp_post_types;
        $labels = &$wp_post_types['post']->labels;
        $labels->name="Contacts";
        $labels->singular_name="Contact";
        $labels->add_new = 'Add Contact';
        $labels->add_new_item = 'Add Contact';
        $labels->edit_item = 'Edit Contacts';
        $labels->new_item = 'Contact';
        $labels->view_item = 'View Contact';
        $labels->search_items="Search Contacts";
        $labels->not_found = 'No Contacts found';
        $labels->not_found_in_trash="No Contacts found in Trash";
    }
    add_action( 'init', 'change_post_object_label' );
    add_action( 'admin_menu', 'change_post_menu_label' );

To change the menu order, go with this:

// CUSTOMIZE ADMIN MENU ORDER
   function custom_menu_order($menu_ord) {
       if (!$menu_ord) return true;
       return array(
        'index.php', // this represents the dashboard link
        'edit.php', //the posts tab
        'upload.php', // the media manager
        'edit.php?post_type=page', //the posts tab
    );
   }
   add_filter('custom_menu_order', 'custom_menu_order');
   add_filter('menu_order', 'custom_menu_order');

I’ve got code to remove items, but it’s globally and not based on user access level