function onTap ( event ) {

	            event.preventDefault();
	            event.stopPropagation();

	            menu = scope.mainMenu;
	            menu.changeSize( menu._width );
	            menu.unslideAll();
	            menu.show();
	            subMenu.slideAll( true );
	            subMenu.hide();

	            if ( this.type !== 'header' ) {

	                subMenu.setActiveItem( this );
	                scope.activeMainItem.setSelectionTitle( this.textContent );

	                if ( this.handler ) { this.handler(); }

	            }

	        }
Create sub menu
@param {string} title - Sub menu title
@param {array} items - Item array list
@memberOf Widget
@instance
@return {HTMLElement} - A span element