Trait which allow use only order column to reorder items in Laravel Backpack.

SimpleReorderTrait.php

<?php
namespace App\Http\Controllers\Admin\Contracts;

/**
 *  Instead of "Nested Set pattern" use only "order" column to reorder the items in the database.
 *  Database columns needed: id, name, order
 *
 *  @return
 */ 
trait SimpleReorderTrait
{
    public function saveReorder()
    {
        $this->crud->hasAccessOrFail('reorder');

        $all_entries = \Request::input('tree');

        if (count($all_entries)) {
            $count = 0;

            foreach ($all_entries as $key => $entry) {
                if ($entry['item_id'] != '' && $entry['item_id'] != null) {
                    $item = $this->crud->model->find($entry['item_id']);
                    $item->order = empty($entry['left']) ? null : $entry['left'];
                    $item->save();

                    $count++;
                }
            }
        } else {
            return false;
        }

        return 'success for '.$count.' items';
    }
}