articles.php

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

class Articles extends Controller {

	function Articles() {
		parent::Controller();
	}
	
	
	function edit($id = NULL) {
		if ($id !== NULL) {
			// Load this article's data
			// If the article doesn't exist, redirect to the creation form
			$this->load->model('article');
			$data['article'] = $this->article->get($id);
			if ($article === FALSE) redirect('articles/create');
		}
		
		$data['partial'] = 'articles/edit';
		$this->load->view('layout', $data);
	}
	
	
	// You could also accomplish this by using the config/routes.php file
	function create() {
		$this->edit();
	}

}