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

class Dashboard extends CI_Controller {

    function Dashboard()
    {
        parent::__construct();

        if(!$this->session->userdata('logged'))
            redirect('login');
    }

    public function index()
    {
		//$this->load->model('upload_model');
        $data['page_title']  = "Dashboard";

        // Load View
        $this->template->show('dashboard', $data);

		/*if($this->input->post('upload')){
			$this->upload_model->do_upload();
		}*/
		//$this->load->view('upload_form');
    }

	public function doUpload(){
		$config = array(
			'upload_path' => 'member/',
			'allowed_types'=> 'png|jpg|jpeg',
			'max_size'=> '1000',
			'max_width'=> '1920',
			'max_height'=> '1200'
		);

		$this->load->library('upload', $config);
		if(!$this->upload->do_upload()){
			$error = array('error' => $this->upload->display_errors());

		}else{
			$finfo = $this->upload->data();
			echo '<pre>';
			//dapatkan info file
			print_r($finfo);
			echo '<pre>';
			$this->_createThumbnail($finfo['file_name']);

			$data['uploadInfo'] = $finfo;
			$data['thumbnail_name'] = $finfo['raw_name'] . '_thumb' . $finfo['file_ext'];

			$this->load->view('upload_success',$data);
			$this->load->view('dashboard',$data);
		}

	}

	function _createThumbnail($filename){
		$config = array(
			'image_library' => 'gd2',
			'source_image' => 'member/' . $filename,
			'new_image' => 'member/profile',
			'create_thumb' => 'true',
			'maintain_ratio' => 'true',
			'width' => 150,
			'height' => 175
		);
		$this->load->library('image_lib',$config);
		if(!$this->image_lib->resize())
			echo $this->image_lib->display_errors();

	}


}

dashboard.php(view)
<?php
// Load Menu
$this->template->menu('dashboard');
?>

<div id="container">

	<div class="upload">
		<?php echo form_open_multipart('index.php/dashboard/doUpload');//call controller
			echo form_upload('userfile');
			echo form_submit('upload','Upload Image');
			echo form_close();
		?>
	</div>

	<div id="image">
		<img alt="your profile image" src="<?php echo base_url() . '/member/profile/' . $thumbnail_name;?>"/>
	</div>


</div>