为什么我的分页代码不起作用

这是我的分页函数，在该函数下编写分页代码，我在另一个函数中调用了这个分页函数（abc（offset=0）），login_process在else if part中，并传递了abc函数值以查看函数login_process和login_view内的admin_view，我使用了分页代码，并且获取的数据以分页显示，但是当我单击链接1 2或任何然后出现时错误 在此服务器上找不到请求的 URL/简洁/welcome/abc/1。并且未暗示分页我的分页功能代码：

public function abc($offset = 0){
    $this->load->model('insert_model');
     //$data ['query'] = $this->insert_model->view_data(); 
    $this->load->library('table');
    // Load Pagination
    $this->load->library('pagination');
    // Config setup
    $config['base_url'] = base_url().'/welcome/abc';
$items= $config['total_rows'] = 20;
    $perpage=$config['per_page'] = 1;
    // I added this extra one to control the number of links to show up at each page.
    $config['num_links'] = 5;
    // Initialize
    $this->pagination->initialize($config);
    // Query the database and get results
    // Here we add the limit and the offset
    // The second parameter is the limit, since we are showing
    // 10 per page, the limit should be 10
    $data['books'] = $this->db->get('register',5, $offset);
    // Create custom headers
    $header = array('id','username','lastname','email' , 'password', 'image','status');
    // Set the headings
    $this->table->set_heading($header);
    // Load the view and send the results
    return $data['books'];
}

我的login_process函数，我在其中调用了 ABC 并将其值传递给 admin_view（仅查看其 elseif 部分）

 public function login_process()
    {
        $this->load->model('insert_model');
        $data['users'] = array(
                            'fname' => $this->input->post('fname'),
                            'pass'=> $this->input->post('pass'),
                           ); 

        $status= $this->insert_model->login_test($data);
        $st['ss']=$this->insert_model->stat($data); 
        //print "<pre>"; print_r($status); die();
        if($status == true && $st['ss'] [0] ['status'] == 0)
        {
            $ses = array(
                        'username' =>  $this->input->post('fname'),
                        'password' =>  $this->input->post('pass'),
                );
             $this->session->set_userdata($ses);
             $im['pic']=$this->insert_model->image_fetc();
             $this->load->view('header_view',$im);
             $this->load->view('navside_view');
             $this->load->view('user_view');
        }
        elseif($status == true && $st['ss']['0'] ['status'] == 1)
        {
            $ses = array(
                        'username' =>  $this->input->post('fname'),
                        'password' =>  $this->input->post('pass'),
                );
             $this->session->set_userdata($ses);
             $im['pic']=$this->insert_model->image_fetc();

            // print_r($aaa); die();
            //  $data['aa'] = "sd";     
            $data['books'] = $this->abc();
             $this->load->view('header_view',$im);
             $this->load->view('navside_view');
             $this->load->view('admin_view', $data);
        }
        else
            {
                $this->load->view('header_view');
             $this->load->view('navside_view');
             $this->load->view('center_view_login');
            }
}

我的admin_view代码

  echo $this->table->generate($books); ?>
    <?php echo $this->pagination->create_links(); ?>

请检查我做错了什么..