codeigniter Insert ข้อมูลในหน้าเดียวกันยังไงครับ

<?php 
if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Ledger extends CI_Controller {
	private $ss;
	public function index(){
		$this->load->library('session');
		$this->ss=(array)$this->session->userdata('profile');
		if(!isset($ss['id'])) exit('No found session id '); //exit('No direct script access allowed');
		if(!isset($_REQUEST['run'])) exit('No found request run'); // exit('No direct script access allowed');
		$rq=$_REQUEST;
		switch($rq['run']){
			case 'save_main': $this->save_main( $rq ); break;
			case 'save_group': $this->save_group( $rq ); break;
			case 'save_ledger': $this->save_ledger( $rq ); break;
			case 'test': echo 'TEST';
		}
	}
	private function save_main($rq){
		if( $rq['m_id']!=='insert'){
			$id=intval($rq['m_id']); $where = "m_id = $id"; 
			$str = $this->db->update_string('acc_ledger_main', $rq['ro'], $where);		
			$this->db->query($str);
		}else{
			$ro=$rq['ro'];
			if($ro['main_id']>''){
				$ro['user_id']=$this->ss['id'];
				$str = $this->db->insert_string('acc_ledger_main', $ro );
				$this->db->query($str); 
			}else{
				$str='INSERT INTO acc_ledger_main '.
					'SELECT null, ?, max(main_id) + 1, ? , ? '.
					'FROM acc_ledger_main where user_id='.$ss['id'];
				$this->db->query($str, array($this->ss['id'], $ro['main_name'], $ro['main_is_cr']));
			}
			$id = $this->db->insert_id();
		}
		$rs=$this->db->query('select * from acc_ledger_main where m_id='.$id); 
		$row=$rs->result_array();
		echo json_encode( array( 'type'=>'complete', 'id'=>$id, 'str'=>$str, 'ro'=>$row[0] ) ); 
	}
	private function save_group( $rq ){
		if( $rq['id']!=='insert'){
			$id=intval($rq['id']);
			$where = "g_id = $id"; 
			$str = $this->db->update_string('acc_ledger_grouup', $rq['ro'], $where); 
			$this->db->query($str);
		}else{
			$str = $this->db->insert_string('acc_ledger_grouup', $rq['ro'] );
			$this->db->query($str); $id = $this->db->insert_id();
		}
		echo json_encode( array( 'type'=>'complete', 'id'=>$id, 'str'=>$str ) ); 
	}
	private function save_ledger( $rq ){
		if( $rq['id']!=='insert'){
			$id=intval($rq['id']);
			$where = "id = $id"; 
			$str = $this->db->update_string('acc_ledger', $rq['ro'], $where); 
			$this->db->query($str);
		}else{
			$str = $this->db->insert_string('acc_ledger', $rq['ro'] ); 
			$this->db->query($str); $id = $this->db->insert_id();
		}
		echo json_encode( array( 'type'=>'complete', 'id'=>$id, 'str'=>$str ) );
	}
}
?>

<?php
class Member extends CI_CONTROLLER
{
    public function __construct()
    {
        parent::__construct();
        $this->load->model("member_model","member");
        $this->load->library("form_validation");
    }
    public function index()
    {
        //$this->rs = $this->member->getall();
        $this->load->view("member/index");
    }
    public function create()
    {
        $config = array(
            array(
                "field"=>"name",
                "label"=>"ชื่อ",
                "rules"=>"required"
            ),
            array(
                "field"=>"surname",
                "label"=>"นามสกุล",
                "rules"=>"required"
            ),
            array(
                "field"=>"email",
                "label"=>"อีเมล์",
                "rules"=>"required|valid_email|callback_check_exists_email"
            )
        );

        $this->form_validation->set_rules($config);

        if($this->form_validation->run()==FALSE)
        {
            $this->load->view("member/create");
        }else
        {
        }
    }
    public function check_exists_email($email){
        $check = $this->member->findemail($email);
        if($check)
        {
            return TRUE;
        }else{
            $this->form_validation->set_message("check_exists_email","%s มีข้อมูลอยู่แล้ว");
            return FALSE;
        }
    }

    public function check_exists_email_edit($email,$id){
        $check = $this->member->findemail_edit($email,$id);
        if($check)
        {
            return TRUE;
        }else{
            $this->form_validation->set_message("check_exists_email_edit","%s มีข้อมูลอยู่แล้ว");
            return FALSE;
        }
    }
}

<!doctype html>
<html lang="th">
<head>
    <meta charset="utf-8"/>
    <title>MEMBER</title>
</head>
<body>

<h1>MEMBER</h1>

<table>
    <thead>
        <tr>
            <th>No</th>
            <th>ชื่อ</th>
            <th>นามสกุล </th>
            <th>Email</th>
        </tr>
    </thead>
    <tbody>
        <?php if(count($rs)>0):
            $no = 1;
        ?>
            <?php foreach($rs as $r):?>
                <tr>
                    <td><?php echo $no;?></td>
                    <td><?php echo $r->name;?></td>
                    <td><?php echo $r->surname;?></td>
                    <td><?php echo $r->email;?></td>
                </tr>
            <?php
                $no++;
            endforeach;?>
        <?php endif;?>
    </tbody>
</table>

<?php echo validation_errors(); ?>

<?php echo form_open("");?>

<table>
    <tr>
        <td>Name</td>
        <td><input type='text' name='name' value="<?php echo set_value("name");?>"/></td>
    </tr>

    <tr>
        <td>Surname</td>
        <td><input type='text' name='surname' value="<?php echo set_value("surname");?>"/></td>
    </tr>

    <tr>
        <td>Email</td>
        <td><input type='text' name='email' value="<?php echo set_value("email");?>"/></td>
    </tr>

    <tr>
        <td>&nbsp;</td>
        <td><input type='submit' name='submit' value="Save"/></td>
    </tr>
</table>

<?php echo form_close();?>


</body>
</html>

<?php 
class manage extends CI_Controller
{
	public function __Construct()
	{
		parent::__Construct();
		$this->load->model('user_model','user');
	}
	public function index()
	{
		$var['rs'] = $this->user->get_all();
		$this->load->view('user/index',$var);
	}
	public function inser_user()
	{
		$ar = array(
			'name' => $this->input->post('fname')
		);	
		if($this->user->insert($ar))
		{
			redirect('manage/index');
		}
	}	
}
?>

<?php
class user_model extends CI_Model
{
	public function get_all()
	{
		return $this->db->get('tb_user')->result();
	}
	public function insert($ar)
	{
		if(!empty($ar)){
			return $this->db->insert('tb_user',$ar);
		}	
	}
}
?>

<html>
	<head>
		<title>Hello</title>
	<head/>
	<body>
		<table>
			<thead>
				<td>Name</td>
			</thead>
			<tbody>
				<?php if(!empty($rs)):?>
					<?php foreach($rs as $data):?>
					<tr>
						<td><?php echo $data->name;?></td>
					</tr>
					<?php endforeach;?>
				<?php :else:?>
					<td>--No Data--</td>
				<?php endif;?>
			</tbody>
		</table>
		<hr>
		<?php echo form_open('manage/insert_user');?>
			<input type="text" name="fname">
			<input type="submit" value="save">
		<?php echo form_close();?>
	</body>
</html>