controller.php

<?php defined('SYSPATH') or die('No direct script access.');

/**
 * Controller default view loading for Kostache!
 *
 * To get your controllers guessing what views to load simply
 * place this file into your "classes" directory in your application.
 */
class Controller extends Kohana_Controller {
	
	/**
	 * @var  mixed  Holds the current view instance
	 */
	public $view = NULL;
	
	/**
	 * @var  string  The view class
	 */
	public $view_class = 'View';
	
	/**
	 * @var  array  Define viewless actions here
	 */
	public $viewless = array();

	/**
	 * The before method can be used for predicting a view. It uses the
	 * controller and it's directory, along with the action to work out
	 * what path to load. For example Controller_Blog_Comments::action_add
	 * would have a view location of blog/comments/add.
	 *
	 * @return  void
	 */
	public function before()
	{
		// If not a viewless action
		if ( ! in_array($this->request->action, $this->viewless))
		{
			$view_parts = array();
			
			foreach (array('directory', 'controller', 'action') as $_part)
			{
				if (isset($this->request->{$_part}))
				{
					$view_parts[] = $this->request->{$_part};
				}
			}
			
			// Build the view location
			$view_location = implode('/', $view_parts);
			
			// Load the view using chosen class
			$this->view = call_user_func($this->view_class.'::factory', $view_location);
		}
		
		return parent::before();
	}
	
	/**
	 * The after method turns the view into a response
	 *
	 * @return  void
	 */
	public function after()
	{
		if ($this->view !== NULL)
		{
			$this->request->response = $this->view;
		}
		
		return parent::after();
	}
	
}

controllerSLASHblog.php

<?php defined('SYSPATH') or die('No direct script access.');

/**
 * Example controller using the view guessing marlarkey
 */
class Controller_Blog extends Controller {

	/**
	 * Let's use Kostache instead!
	 * @var
	 * @see  Controller::$view_class
	 */
	public $view_class = 'Kostache';
	
	/**
	 * @var
	 * @see  Controller::$viewless
	 */
	public $viewless = array('create');

	/**
	 * For this action the view "blog/index" will have been already loaded.
	 *
	 * @return  void
	 */
	public function action_index()
	{
		// Set some $_GET data to view
		$this->view->set(Arr::extract($_GET, array('page', 'order_by')));
	}
	
	/**
	 * This action loads the "blog/add" view and nothing else
	 *
	 * @return  void
	 */
	public function action_add()
	{
		// No need to do anything
	}
	
	/**
	 * This action creates the blog post, it doesn't need a view.
	 *
	 * @return  void
	 */
	public function action_create()
	{
		$post = Model::factory('post', $_POST);
		
		// Try and create
		try
		{
			$post->create();
		}
		catch (Kohana_Validate_Exception $e)
		{
			// We set the errors to session here before we redirect.
			Session::instance()->set('errors', $e->array->errors());
		}
		
		// Redirect back to index action
		$this->request->redirect($this->request->uri(array('action' => 'add')));
	}

}