eiru_base_menu/views/registration_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
    	<!-- 
        ====================================
            MENU REGISTROS
        ====================================
        -->
        <menuitem
            name="Registros"
            id="menu_registrations"
            sequence="1"/>
        
        <!-- Ventas -->
        <menuitem
            name="Ventas"
            id="eiru_base_menu.menu_registration_sales"
            parent="eiru_base_menu.menu_registrations"/>
        
            <menuitem
                name="Registrar Clientes"
                id="base.menu_partner_form"
                parent="eiru_base_menu.menu_registration_sales"/>
        
        <!-- Compras -->
        <menuitem
            name="Compras"
            id="eiru_base_menu.menu_registration_purchases"
            parent="eiru_base_menu.menu_registrations"/>

            <menuitem
                name="Registrar Proveedores"
                id="base.menu_procurement_management_supplier_name"
                parent="eiru_base_menu.menu_registration_purchases"/>
    </data>
</openerp>