coba ini

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

class Admin extends CI_Controller{
    function __construct(){
        parent::__construct();
        $this->load->helper('url');
        $this->load->model('m_admin');
        if($this->session->userdata('status') != "login"){
            redirect('login');
        }
    }
function index(){
        $data['vendor']=$this->m_admin->vendor();
        $this->load->view('admin/header',$data);
        $this->load->view('admin/home',$data);
        $this->load->view('admin/footer',$data);
    }
function vendor(){
        $this->load->library('pagination');
        $this->load->library('table');
        $config['base_url'] = '/admin/vendor/';
        $config['total_rows'] = $this->db->get('vendor')->num_rows();
        $config['per_page'] = 10;

        $this->pagination->initialize($config);
//---- curiga yg ini
        $data['records'] = $this->db->get('vendor', $config['per_page'], $this->uri->segment(3));
echo "page =".$config['per_page']."<br>segmen=".  $this->uri->segment(3));
echo "<pre>".print_r($_REQUEST,1)."</pre>";
        $data['vendor']=$this->m_admin->vendor();
        $this->load->view('admin/header');
        $this->load->view('admin/vendor/V_vendorList',$data);
        $this->load->view('admin/footer');
    }

    function tambah_vendor(){
        $this->load->library('form_validation');
        $this->form_validation->set_rules('category','category','required');
        $this->form_validation->set_rules('name','name','required');
        $this->form_validation->set_rules('address','address','required');
        if($this->form_validation->run() != true ){
            $data['vendorCategory'] = $this->m_admin->vendorCategory();
            $this->load->view('admin/header');
            $this->load->view('admin/vendor/v_vendorAdd',$data);
            $this->load->view('admin/footer');
        }else{
            $category = $this->input->post('category');
            $name = $this->input->post('name');
            $address = $this->input->post('address');
            $config['upload_path'] = './gambar_posting/';
            $config['allowed_types'] = 'gif|jpg|png';
            $this->load->library('upload', $config);
            $this->upload->do_upload('icon');
            $data = array('upload_data' => $this->upload->data());
            $d = array(
                'category' => $category,
                'name' => $name,
                'address' => $address,
                'icon' => $data['upload_data']['file_name']
                );
            $this->m_admin->tambah_vendor($d);
            redirect('admin/vendor/oke','refresh');
        }
    }

    function edit_vendor($id){
        $this->load->library('form_validation');
        $data['vendor'] = $this->m_admin->edit_vendor($id);
        $data['vendorCategory'] = $this->m_admin->vendorCategory();
        $this->load->view('admin/header');
        $this->load->view('admin/vendor/V_vendorEdit',$data);
        $this->load->view('admin/footer');
    }

    function update_vendor(){
        $this->load->library('form_validation');
        $id = $this->input->post('id');
        $this->form_validation->set_rules('category','category','required');
        $this->form_validation->set_rules('name','name','required');
        $this->form_validation->set_rules('address','address','required');
        if($this->form_validation->run() != true ){
            $data['vendor'] = $this->m_admin->edit_vendor($id);
            $data['vendorCategory'] = $this->m_admin->vendorCategory();
            $this->load->view('admin/header');
            $this->load->view('admin/vendor/V_vendorEdit',$data);
            $this->load->view('admin/footer');
        }else{
            $category = $this->input->post('category');
            $name = $this->input->post('name');
            $address = $this->input->post('address');
            if($_FILES['icon']['name'] == ""){
                $d = array(
                    'category' => $category,
                    'name' => $name,
                    'address' => $address
                    );
                $this->m_admin->update_vendor($d,$id);
                redirect('admin/vendor/diupdate','refresh');
            }else{
                $config['upload_path'] = './gambar_posting/';
                $config['allowed_types'] = 'gif|jpg|png';
                $this->load->library('upload', $config);
                $this->upload->do_upload('icon');
                $data = array('upload_data' => $this->upload->data());
                $d = array(
                    'category' => $category,
                    'name' => $name,
                    'address' => $address,
                    'icon' => $data['upload_data']['file_name']
                    );
                $this->m_admin->update_vendor($d,$id);
                redirect('admin/vendor/diupdate','refresh');
            }
        }
    }

    function hapus_vendor($id){
        $this->m_admin->hapus_vendor($id);
        redirect('admin/vendor/dihapus');
    }
}