users.php

<?php if (!defined('BASEPATH')) exit('No direct script access allowed.');

class Users extends Controller() {

  public function __construct() {
    parent::__construct();
  }

  public function view($username) {
    $this->load->model('user');
    $data['user'] = $this->user->get($username) or show_404();

    $this->load->view('user_info', $data);
  }
}