Codeigniter 3: Don’t reload form on form validation error

I’m new with codeigniter. I have this form and in the end of the form the user have to re-enter his password for confirmation, however, the page reloads if the password was incorrect and all the data that the user typed on the input field disappeared. Is there a way for the validation_error to output without the page reloading?

Here’s my view form SHIFTER.HTML

<?php echo form_open('forms/submit_form');?>              
<div id="form-interview-fill-mainform">
    <div class="container">
            <div class="col-sm-6">
                <div class="form-group">
                    <label>Strengths:</label>
                    <textarea class="form-control form-input" onkeyup="textAreaAdjust(this)" rows="1" name="shifter_answer[]"></textarea>
                </div>
            </div>
            <div class="col-sm-6">
                <div class="form-group">
                    <label>Weaknesses:</label>
                    <textarea class="form-control form-input" onkeyup="textAreaAdjust(this)" rows="1" name="shifter_answer[]"></textarea>
                </div>
            </div>
     <div class="custom-form">
       <?php
        if(validation_errors()){
        ?>
        <div class="alert alert-danger alert-dismissible" role="alert">
          <button type="button" class="close" data-dismiss="alert" aria-lable="Close"><span aria-hidden="true">&times;</span></button>
          <strong><?php echo validation_errors()?></strong>
        </div>
        <?php  
        }?>
        <label>Password</label>
        <center>
        <?= form_password('password','','class="form-control" id="password" style="width:80%;font-size:20px;" required');?> 
        </center>
    </div>
     <center><?php echo form_submit('submit','Submit Form', 'class="btn btn-success btn-lg"');?></center>
    </div>
</div> 
<?php echo form_close();?>

Here’s the controller

public function submit_form(){
    $this->form_validation->set_rules('password','Password','trim|required|callback_check_pass');
    if ($this->form_validation->run()==false){
        $this->load->view('shifter.html');
    }else {
         $session_data = $this->session->userdata('logged_in');

    $data['id'] = $session_data['id'];
    $givenAns= $this->input->post('shifter_answer');

    foreach($givenAns as $ansKey => $ansVal){
        $ansKey+=16;
        $ids []= $this->forms_model->shifter_form_submit($data['id'],$ansVal,$ansKey);
    }
    redirect('profile/forms','refresh');
    }


}

 function check_pass($password){
    $session_data = $this->session->userdata('logged_in');
    $data['id'] = $session_data['id'];
    $password = $this->input->post('password');
    $this->load->model('forms_model');
    $result = $this->forms_model->val_password($data['id'],$password);
        if($result){
            return true;
        }else{
            $this->form_validation->set_message('check_pass', "Invalid Password");

            return false;
        }
}     

And here’s the model

 function val_password($id,$password){
         $this->db->select('id,password');
        $this->db->from('tbl_st_account');
        $this->db->where('id', $id);
        $this->db->where('password', $password);
        $this->db->limit(1);

        $query = $this->db->get();

            if($query->num_rows()==1){
                return $query->result();
            }else{
                return false;
            }    
      }

Answer

The page is reloading before the server even performs the validation. You’ll need to use AJAX. AJAX the request. On failed validation, have the AJAX callback pop a message to the user. On successful validation, have the AJAX callback direct the user to the desired page.