Page.php

<?php
class Page extends CI_Controller{


  public function index(){
    $this->load->view('form');
  }
    public function cek_validasi(){
    $this->load->library('form_validation');

    $this->form_validation->set_rules('nama', 'nama', 'trim|required');
    if ($this->form_validation->run() == FALSE) {
      $this->index();
    }else {
      echo "data aman";
    }
    }
}