Ttdfjt

Below is my code for my menu and it does not work on my side.

config.xml

<config>
<modules>
 <MasteringMagento_Example>
 <version>1.0.0</version>
 </MasteringMagento_Example>
</modules>
<global>
 <models>
 <example>
 <class>MasteringMagento_Example_Model</class> 
 </example>
 </models>
 <blocks>
 <example>
 <class>MasteringMagento_Example_Block</class>
 </example>
 </blocks>
 <helpers>
 <example>
 <class>MasteringMagento_Example_Helper</class>
 </example>
 </helpers>
</global>

adminhtml.xml

<config>
<menu>
 <example translate="title" module="example">
 <title>Example</title>
 <sort_order>1000</sort_order>
 <action>adminhtml/example</action>
 </example>
</menu>

You know, the admin menu contains a lot of files, I'll not put all the module files, but I will help you to direct you to the right solution.

app/code/local/MasteringMagento/Example/etc/config.xml

...
</global> 
<adminhtml>
 <layout>
 <updates>
 <example>
 <file>example.xml</file>
 </example>
 </updates>
 </layout>
</adminhtml>
</config> 

app/code/local/MasteringMagento/Example/etc/adminhtml.xml

<?xml version="1.0" encoding="UTF-8"?>
 <config>
 <menu>
 <menu1 module="example" translate="title">
 <title>Menu 1</title>
 <sort_order>100</sort_order>
 <children>
 <item1 module="example" translate="title">
 <title>Submenu 1</title>
 <sort_order>1</sort_order>
 <action>adminhtml/menu/index</action>
 </item1>
 <item2 module="example" translate="title">
 <title>Submenu 2</title>
 <sort_order>2</sort_order>
 <action>adminhtml/index/index</action>
 </item2>
 </children>
 </menu1>
 </menu>
 <acl>
 <resources>
 <admin>
 <children>
 <menu1 translate="title" module="example">
 <title>Menu 1</title>
 <sort_order>100</sort_order>
 <children>
 <item1 translate="title">
 <title>Submenu 1</title>
 <sort_order>1</sort_order>
 </item1>
 <item2 translate="title">
 <title>Submenu 2</title>
 <sort_order>2</sort_order>
 </item2>
 </children>
 </menu1>
 </children>
 </admin>
 </resources>
 </acl>
 </config>

app/code/local/MasteringMagento/Example/controllers/Adminhtml/IndexController.php

<?php

class MasteringMagento_Example_Adminhtml_IndexController extends Mage_Adminhtml_Controller_Action

 public function indexAction()
 
 $this->loadLayout()
 ->_setActiveMenu('menu/menu')
 ->_title($this->__('Submenu1'));
 $this->renderLayout();
 
 

app/design/adminhtml/default/default/layout/example.xml

<?xml version="1.0" encoding="UTF-8"?>
<layout version="0.1.0">
 <adminhtml_index_index>
 <reference name="content">
 <block type="exemple/adminhtml_menu" name="exemple"/>
 </reference>
 </adminhtml_index_index>
</layout>

Now you have to create all files block ...