how I add view helper in zend

I want to add custom view helper in zend framework like this:

1. I placed in application.ini this code:

   includePaths.library = APPLICATION_PATH "/../library"
   and create library directory in myproject root

2. create view helper TabEntry.php in library directory

   class Zend_View_Helper_TabEntry extends Zend_View_Helper_Abstract {

   public function TabEntry() {

   }
   }

3. create another view helper TabEntries.php in library directory

   class Zend_View_Helper_TabEntries extends Zend_View_Helper_TabEntry {

   public function TabEntries() {

   }
   }

4. when in my phtml use $this->TabEntries() get error
5. in Bootstrap.php I add some code:
   $view->addHelperPath('MyView/Helpers', "library_MyView_Helpers");
   $viewRenderer = Zend_Controller_Action_HelperBroker::getStaticHelper('ViewRenderer'); $viewRenderer->setView($view);

According to ZF coding application structure, correct version would be:

In application.ini:

resources.view.helperPath.Your_View_Helper = "Your/View/Helper"

Then the helpers: (not sure why do you need another abstract class):

// library/Your/View/Helper/TabEntry/Abstract.php

class Your_View_Helper_TabEntry_Abstract extends Zend_View_Helper_Abstract {
    public function tabEntry($param1, $param2) {} // note the lower case here
}

// library/Your/View/Helper/TabEntries.php

class Your_View_Helper_TabEntries extends Your_View_Helper_TabEntry_Abstract {
    public function tabEntries($param1, $param2) {...} // note the lower case
}

In the view:

$this->tabEntries();

Important: call_user_func and Linux filesystem are case sensitive.