How To Remove Help Menu From Joomla Administrator's Menu

The First Thing to do this is:
Just go to the folder ...administrator >> modules >>mod_menu

Second thing :

Modify the file 'Helper.php'

For e.g. If you want to delete the 'Help Menu'
Go to /* Help SubMenu */ section of Helper.php file
Delete the text -->'Help'
$menu->addChild(new JMenuNode(JText::_('')), true);

This will hide Help Menu....

You can also change links, text...
For e.g.

$menu->addChild(new JMenuNode(JText::_('Your text'), 'http://www.anysite.com', 'class:help'));


I hope that these "tricks" help you along the way.....