form.php

<form method="post" class="form-horizontal" enctype="multipart/form-data">

    <div class="headerbar">
        <h1>Create New Home Page Portlet</h1>
        <?php $this->layout->load_view('layout/buttons'); ?>
    </div>

    <div class="content">

        <?php $this->layout->load_view('layout/alerts'); ?>

            <fieldset>
                <legend><small>* indicates required fields</small></legend>

                <div class="control-group">
                    <label class="control-label">* Title: </label>
                    <div class="controls">
                        <input type="text" name="title" id="title" value="<?php echo $this->wc_portlets->form_value('title'); ?>">
                    </div>
                </div>

                <div class="control-group">
                    <label class="control-label">* Image: </label>
                    <div class="controls">
                        <input type="file" name="userfile" id="userfile">
                    </div>

                </div>

                <div class="control-group">
                    <label class="control-label">Status: </label>
                    <div class="controls">
                        <select name="status">
                            <option value="1" name="1">Active</option>
                            <option value="0" name="0">Inactive</option>
                        </select>
                    </div>
                </div>



            </fieldset>

    </div>

</form>






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

class Portlets extends Admin_Controller
{
    /**
     * Constructor method
     */
    public function __construct()
    {
        parent::__construct();

        // Load Model
        $this->load->model('wc_portlets');

        $gallery_path = realpath(APPPATH . '/../assets/uploads');
        $gallery_path_url = base_url().'uploads/';
    }
    // Upload and Resize
    public function _do_upload_file()
    {

        //upload config
        $config = array(
             'allowed_types' => '*', //jpg|jpeg|gif|png|pdf|JPEG|PNG|JPG|GIF|tiff|PDF
             'upload_path'   => $this->gallery_path,
             'max_size'      => 50000, //50MB limit
             'overwrite'     => false, //Doesnt overwrite exsisting
            'remove_spaces' => true, // Removes any white space
            'encrypt_name'  => true // Encrypt file name
        );

        $this->load->library('upload', $config);
         $this->upload->initialize($config);


        if (!$this->upload->do_upload())
        {
            $this->form_validation->set_message('_do_upload_file', $this->upload->display_errors());
            return FALSE;
        }
        else
        {
        // Resize Config
            $config['image_library'] = 'gd2';
            $config['source_image'] = $this->upload->upload_path.$this->upload->file_name;
            $config['new_image'] = $this->gallery_path . '/thumbs';
            $config['maintain_ratio'] = TRUE;
            $config['width'] = 150;
            $config['quality'] = '100%';
            $config['height'] = 150;

            /* echo $this->upload->upload_path.$this->upload->file_name . "<BR>";  */

            $this->load->library('image_lib', $config);
            $this->image_lib->initialize($config);
            $this->image_lib->resize();

            if (!$this->image_lib->resize()){
                   $this->form_validation->set_message('_do_upload_file', $this->upload->display_errors());
            }


        }

    }

    public function index()
    {
        // Show all portlets
        $this->layout->set('portlets', $this->wc_portlets->paginate()->result());
        $this->frontend->set('title', 'Portlets');
        $this->layout->buffer('content', 'portlets/index');
        $this->layout->render();
    }
    public function form($id = NULL)
    {
        if ($this->input->post('btn_cancel'))
        {
            redirect('portlets');
        }

        if ($this->wc_portlets->run_validation())
        {
            $id = $this->wc_portlets->save($id);
            redirect('portlets/index/' . $id);

        }

        if ($id and !$this->input->post('btn_submit'))
        {
            $this->wc_portlets->prep_form($id);
        }

        $this->layout->buffer('content', 'portlets/form');
        $this->layout->render();
    }
    public function delete($id)
    {
        $this->wc_portlets->delete($id);
        redirect('portlets/index');
    }



}


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


class Admin_Controller extends User_Controller {

    public function __construct()
    {
        date_default_timezone_set('Europe/London');
        parent::__construct('status', 1);

        $gallery_path = realpath(APPPATH . '/../assets/uploads');
        $gallery_path_url = base_url().'uploads/';
    }

}

?>


Model in which is saves to database
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');


class Wc_portlets extends Response_Model {

    public $table = 'wc_portlets';
    public $primary_key = 'id';
    public $date_created_field = 'date_created';

    public function __construct()
    {
        parent::__construct();
    }

    public function default_select()
    {
        $this->db->select('wc_portlets.*');
    }

    public function default_order_by()
    {
        $this->db->order_by('wc_portlets.id');
    }
    // Upload and Resize

    public function createNew()
    {
        $image_data = $this->upload->data();
        $data['image'] = $image_data['file_name'];

        $this->db->insert('wc_portlets', $data);

    }
    public function validation_rules()
    {

        $image_data = $this->upload->data();

        return array(
            'title' => array(
                'field' => 'title',
                'label' => 'Page Title',
                'rules' => 'trim|required'
            ),
            'image' => array(
                'field' => 'userfile',
                'label' => 'Image',
                'rules' => 'callback__do_upload_file|trim'
            ),
            'status' => array(
                'field' => 'status',
                'label' => 'Please select',
                'rules' => 'trim'
            )
        );

    }




}