Make _initialize() a constructor and rename _call_hook() to call_hook in the Hooks class
diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
index a79a695..4885f31 100755
--- a/system/core/CodeIgniter.php
+++ b/system/core/CodeIgniter.php
@@ -133,7 +133,7 @@
  *  Is there a "pre_system" hook?
  * ------------------------------------------------------
  */
-	$EXT->_call_hook('pre_system');
+	$EXT->call_hook('pre_system');
 
 /*
  * ------------------------------------------------------
@@ -194,7 +194,7 @@
  *	Is there a valid cache file? If so, we're done...
  * ------------------------------------------------------
  */
-	if ($EXT->_call_hook('cache_override') === FALSE
+	if ($EXT->call_hook('cache_override') === FALSE
 		&& $OUT->_display_cache($CFG, $URI) == TRUE)
 	{
 		exit;
@@ -297,7 +297,7 @@
  *  Is there a "pre_controller" hook?
  * ------------------------------------------------------
  */
-	$EXT->_call_hook('pre_controller');
+	$EXT->call_hook('pre_controller');
 
 /*
  * ------------------------------------------------------
@@ -314,7 +314,7 @@
  *  Is there a "post_controller_constructor" hook?
  * ------------------------------------------------------
  */
-	$EXT->_call_hook('post_controller_constructor');
+	$EXT->call_hook('post_controller_constructor');
 
 /*
  * ------------------------------------------------------
@@ -369,14 +369,14 @@
  *  Is there a "post_controller" hook?
  * ------------------------------------------------------
  */
-	$EXT->_call_hook('post_controller');
+	$EXT->call_hook('post_controller');
 
 /*
  * ------------------------------------------------------
  *  Send the final rendered output to the browser
  * ------------------------------------------------------
  */
-	if ($EXT->_call_hook('display_override') === FALSE)
+	if ($EXT->call_hook('display_override') === FALSE)
 	{
 		$OUT->_display();
 	}
@@ -386,7 +386,7 @@
  *  Is there a "post_system" hook?
  * ------------------------------------------------------
  */
-	$EXT->_call_hook('post_system');
+	$EXT->call_hook('post_system');
 
 /*
  * ------------------------------------------------------
diff --git a/system/core/Hooks.php b/system/core/Hooks.php
index 493822f..68e30ef 100755
--- a/system/core/Hooks.php
+++ b/system/core/Hooks.php
@@ -25,8 +25,6 @@
  * @filesource
  */
 
-// ------------------------------------------------------------------------
-
 /**
  * CodeIgniter Hooks Class
  *
@@ -51,7 +49,7 @@
 	 *
 	 * @var array
 	 */
-	public $hooks			= array();
+	public $hooks		= array();
 	/**
 	 * Determines wether hook is in progress, used to prevent infinte loops
 	 *
@@ -59,23 +57,17 @@
 	 */
 	public $in_progress	= FALSE;
 
-	public function __construct()
-	{
-		$this->_initialize();
-		log_message('debug', 'Hooks Class Initialized');
-	}
-
-	// --------------------------------------------------------------------
-
 	/**
 	 * Initialize the Hooks Preferences
 	 *
 	 * @return	void
 	 */
-	private function _initialize()
+	public function __construct()
 	{
 		$CFG =& load_class('Config', 'core');
 
+		log_message('debug', 'Hooks Class Initialized');
+
 		// If hooks are not enabled in the config file
 		// there is nothing else to do
 		if ($CFG->item('enable_hooks') == FALSE)
@@ -84,7 +76,7 @@
 		}
 
 		// Grab the "hooks" definition file.
-		if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/hooks.php'))
+		if (defined('ENVIRONMENT') && is_file(APPPATH.'config/'.ENVIRONMENT.'/hooks.php'))
 		{
 			include(APPPATH.'config/'.ENVIRONMENT.'/hooks.php');
 		}
@@ -113,14 +105,14 @@
 	 * @param	string	the hook name
 	 * @return	mixed
 	 */
-	public function _call_hook($which = '')
+	public function call_hook($which = '')
 	{
 		if ( ! $this->enabled OR ! isset($this->hooks[$which]))
 		{
 			return FALSE;
 		}
 
-		if (isset($this->hooks[$which][0]) AND is_array($this->hooks[$which][0]))
+		if (isset($this->hooks[$which][0]) && is_array($this->hooks[$which][0]))
 		{
 			foreach ($this->hooks[$which] as $val)
 			{
@@ -167,7 +159,7 @@
 		// Set file path
 		// -----------------------------------
 
-		if ( ! isset($data['filepath']) OR ! isset($data['filename']))
+		if ( ! isset($data['filepath'], $data['filename']))
 		{
 			return FALSE;
 		}
@@ -187,12 +179,12 @@
 		$function	= FALSE;
 		$params		= '';
 
-		if (isset($data['class']) AND $data['class'] != '')
+		if ( ! empty($data['class']))
 		{
 			$class = $data['class'];
 		}
 
-		if (isset($data['function']))
+		if ( ! empty($data['function']))
 		{
 			$function = $data['function'];
 		}
@@ -202,7 +194,7 @@
 			$params = $data['params'];
 		}
 
-		if ($class === FALSE AND $function === FALSE)
+		if ($class === FALSE && $function === FALSE)
 		{
 			return FALSE;
 		}
@@ -244,4 +236,4 @@
 }
 
 /* End of file Hooks.php */
-/* Location: ./system/core/Hooks.php */
+/* Location: ./system/core/Hooks.php */
\ No newline at end of file
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 47220d6..37c38f1 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -117,6 +117,7 @@
    -  Added method() to CI_Input to retrieve $_SERVER['REQUEST_METHOD'].
    -  Modified valid_ip() to use PHP's filter_var() in the :doc:`Input Library <libraries/input>`.
    -  Added support for HTTP-Only cookies with new config option ``cookie_httponly`` (default FALSE).
+   -  Renamed method _call_hook() to call_hook() in the :doc:`Hooks Library <general/hooks.html>`.
 
 Bug fixes for 3.0
 ------------------