old/application/controllers/admin/Redirects.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Redirects extends MY_Controller
{

    public function __construct()
    {
        parent::__construct();
        $this->load->model('RedirectModel', '', TRUE);
    }

    public function index()
    {
        $this->neededPermission('redirect.view');

        $redirects = $this->RedirectModel->getItems();
        $this->load->view('admin/sidebar', ['title' => 'Alle Weiterleitungen']);
        $this->load->view('admin/redirects', ['redirects' => $redirects]);
        $this->load->view('admin/footer', ['additionalScripts' => ['redirects.js']]);
    }

    public function addRedirect() {
        $this->neededPermission('redirect.create');

        $id = $this->input->post('redirectID');
        $name = $this->input->post('redirectName');
        $url = $this->input->post('redirectUrl');

        if(isset($name) && isset($url)) {
            if(isset($id)) {
                $this->neededPermission('redirect.edit');

                $this->RedirectModel->editRedirect($id, $url, $name);
            } else {
                $this->RedirectModel->insertRedirect($url, $name);
            }
        }

        redirect(base_url('admin/redirects'));
    }

    public function removeRedirect($id = null) {
        $this->neededPermission('redirect.delete');

        if($id != null) {
            $this->RedirectModel->removeRedirect($id);
        }

        redirect(base_url('admin/redirects'));
    }
}