Почему пагинация не работает при переходе по страницам ?

$route['all_movies'] = 'all_movies';
$route['all_movies/create'] = 'all_movies/create';
$route['all_movies/edit'] = 'all_movies/edit';
$route['all_movies/delete'] = 'all_movies/delete';
$route['all_movies/view/(:any)'] = 'all_movies/view/$1';
 
//$route['all_movies/'] = 'all_movies/$1';
$route['all_movies/(:any)'] = 'all_movies/$1';

public function index() {
 
            if(!$this->dx_auth->is_admin()) {
            show_404();
        }
 
        $this->load->library('pagination');
 
        $offset = (int) $this->uri->segment(2);
        $row_count = 20;
 
        $count = count($this->allmovies_model->getAllmovies()); 
        $p_config['base_url'] = '/all_movies/';
 
        $this->data['title'] = "Все киноленты";
 
        $this->data['allmovies_data'] = $this->allmovies_model->getAllmoviesOnPage($row_count, $offset);
 
        if($this->data['allmovies_data'] == null) {
            show_404();
        }
 
 
        $p_config['full_tag_open'] = "<ul class='pagination'>";
        $p_config['full_tag_close'] ="</ul>";
        $p_config['num_tag_open'] = '<li>';
        $p_config['num_tag_close'] = '</li>';
        $p_config['cur_tag_open'] = "<li class='disabled'><li class='active'><a href='#'>";
        $p_config['cur_tag_close'] = "<span class='sr-only'></span></a></li>";
        $p_config['next_tag_open'] = "<li>";
        $p_config['next_tagl_close'] = "</li>";
        $p_config['prev_tag_open'] = "<li>";
        $p_config['prev_tagl_close'] = "</li>";
        $p_config['first_tag_open'] = "<li>";
        $p_config['first_tagl_close'] = "</li>";
        $p_config['last_tag_open'] = "<li>";
        $p_config['last_tagl_close'] = "</li>";
 
        //pagination config
        $p_config['total_rows'] = $count;
        $p_config['per_page'] = $row_count;
 
        //init pagination
        $this->pagination->initialize($p_config);
        $this->data['pagination'] = $this->pagination->create_links();
 
        $this->load->view('templates/header', $this->data);
        $this->load->view('all_movies/index', $this->data);
        $this->load->view('templates/footer');
    }

public function getAllmoviesOnPage($row_count, $offset) {
 
            $query = $this->db
 
            ->order_by('add_date', 'desc')
            ->get('movie', $row_count, $offset);
 
            return $query->result_array();
        }

<h1>Все киноленты</h1>
 
<?php foreach ($allmovies_data as $key => $value): ?>
    <p><a href = "view/<?php echo $value['slug']; ?>"><?php echo $value['name']; ?></a> | <a href = "edit/<?php echo $value['slug']; ?>">edit</a> | <a href = "delete/<?php echo $value['slug']; ?>">delete</a></p>
<?php endforeach ?>
 
  <?php echo $pagination; ?>