Edit my application previously selected item should be viewed?

I want to my application previously selected items to be displayed accordingly.
How to implement this .
Controller
********

Code:

$data['getcert'] = $this->User_Model->getcert();

Model
*****

Code:

$regno = $this->session->userdata('username');
  $this->db->select('*');
  $this->db->from('certificate_det');
  $this->db->where('appdet.regno',$regno);
  $this->db->join('appdet', 'appdet.certid = certificate_det.certificate_id', 'left');
  $query = $this->db->get();
  return $query->result_array();
  echo $query;  
    }

View
*****

Code:

value="<?php echo (!isset($posted['email'])) ? '' : $posted['email'] ?>"

Is this way to fetch the details

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