You can use Online Help Sliding Menu plugin to transform menu into online help style sliding menu with the possibility of adding your own custom CSS styling..
To use Online Help Sliding Menu, all you have to do is to go to the Widgets page of WordPress Admin and add OH Sliding Menu widgets on any of the available areas..
If you choose Pages menu, you will be able to enter IDs of the pages you want to exclude from the menu..
For Pages that have child pages the menu will add folder icon on the left side of the page name.
When you click the folder icon, the menu will slide down, the folder icon opens and the menu slides down showing the child pages..
Every time you navigate to page on the menu, the current state of the menu is kept for the browser session...
Upload the plugin files to the wp-content plugins Online Help Sliding Menu directory, or install the plugin through WordPress plugins screen directly..
Create Custom Menu or arrange the Pages of your website in the order you want them to appear on Online Help Sliding Menu..
Go to Appearance->Widgets screen and add OH Sliding Menu to Sidebar area or any widget area..
You will be notified that the Custom menu is not found for that widget and the widget will switch to the Pages menu...
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