<div class="form-group">
<label>Question</label>
<?php if($this->input->post('ques_id')) echo $this->input->post('ques_id'); else echo $data->ques_id; ?>
<?php $a= json_decode($data->ques_id);echo "<pre>"; print_R($a);"<br>";?>
<select  name="question[]" id="question" multiple="multiple">
<?php foreach($categories as $ques_id=>$question){ ?>
<option value="<?php echo $ques_id?>" <?php if(($this->input->post('question') && $this->input->post('question') == $ques_id) || $data->question == $ques_id) echo 'selected';?>>          <?php echo $question->question?></option>
<?php $value = json_decode($result->value);?>
<?php } ?>
</select>
</div>
<script>
 $(function() {
            $('#question').change(function() {
                console.log($(this).val());
            }).multipleSelect({
                width: '100%'
            });
</script>

public function edit($interview_id) {
        $this->data['categories']=$this->Interview_model->getcategories();
        $where = ' interview_id = ? ';
        $where_data [] = $interview_id;
        if ($this->input->post ()) {
            $update_data = array ();
            $update_data ['name'] = $this->input->post ( 'name' );
            $update_data ['education'] = $this->input->post ( 'education' );
            $update_data ['ques_id'] = json_encode($this->input->post ( 'question' ));
            $update_data ['quotes'] = $this->input->post ( 'quotes' );
            $update_data ['comment'] = $this->input->post ( 'comment' );
            $update_data ['status'] = ( int ) $this->input->post ( 'status' );
            $update_data ['Datetime'] = $this->Interview_model->getCurrentDatetime ();
            if (! $this->input->post ( 'old_image' )) {
                $field_name = 'image';
                $temp_file_name = $this->file [$field_name] ['name'];
                $file_name = time () . '_' . $this->randomString ( 10 ) . '.' . $this->getFileExtension ( $temp_file_name );

                if (! $this->uploadImage ( $this->upload_path, $file_name, $field_name )) {
                    $this->session->set_flashdata ( 'error', $this->file_error );
                }
                $this->createThumbnail ( $this->file_data ['full_path'], $this->upload_path . '/thumb/' . $file_name, 75, 50 );
                $update_data ['image'] = $file_name;
            }
            if (! $this->Interview_model->__update ( 'ph_interview', $update_data, array (
                    'interview_id' => $interview_id
            ) )) {
                $this->session->set_flashdata ( 'error', 'Record couldn'n updated. Please try again.' );
            } else {
                $this->session->set_flashdata ( 'success', 'Interview updated successfully.' );
                //redirect ( 'admin/Interview' );
            }
        }
        $rs = $this->Interview_model->__select ( 'ph_interview', '*', $where, $where_data );
        $result = $rs->result ();
        $this->data ['data'] = $result [0];
        $this->load->view ( 'admin/template/header' );
        $this->load->view ( 'admin/Interview/edit', $this->data );
        $this->load->view ( 'admin/template/footer' );
    }

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

class Interview_model extends MY_Model {

    public function __construct(){
        parent::__construct();
    }
    public function getinterview_ques($where=array()){
        $category = array();
        $sql ='select * from ph_interview_ques ';
        if(!empty($where)){
            $con='';
            foreach($where as $key=>$value){
                if(!empty($con)){
                    $con .=' and ';
                }
                $con .=' '.$key.'  ? ';
            }
            $con = trim($con,',');
            $sql .=' where '.$con.' order by question ';
            $rs = $this->db->query($sql,array($where));
        }
        else{
            $sql .=' order by question ';
            $rs = $this->db->query($sql);
        }
        foreach($rs->result() as $result){
            $question[$result->ans] = $result;
        }
        return $question;
    }

    public function getcategories(){
        $sql ="select * from ph_interview_ques order by ques_id asc";
        $rs = $this->db->query($sql);
        foreach($rs->result() as $record ){
            $result[] = $record;
        }
        return $result;
    }

    public function getQuestions($ids){
        $sql ="select * from ph_interview_ques where ques_id in($ids) order by ques_id asc";
        $rs = $this->db->query($sql);
        foreach($rs->result() as $record ){
            $result[] = $record;
        }
        return $result;
    }
    public function getinterviewr($where=array()){
        $category = array();
        $sql ='select * from ph_interview ';
        if(!empty($where)){
            $con='';
            foreach($where as $key=>$value){
                if(!empty($con)){
                    $con .=' and ';
                }
                $con .=' '.$key.'  ? ';
            }
            $con = trim($con,',');
            $sql .=' where '.$con.' order by name ';
            $rs = $this->db->query($sql,array($where));
        }
        else{
            $sql .=' order by name ';
            $rs = $this->db->query($sql);
        }
        foreach($rs->result() as $result){
            $name[$result->name] = $result;
        }
        return $name;
    }

}
?>