good/staff_expense/view/hr_expense_menu.xml

<?xml version="1.0"?>
<odoo>
    <data>
        <!-- 根菜单 -->
        <menuitem id="hr_expense" name="费用报销" parent="staff.menu_staff_root" sequence="50"/>

        <!-- 员工报销子菜单 -->
        <menuitem id="hr_expense_country" name="员工报销" action="hr_expense_action"
            parent="hr_expense" sequence="10"/>

        <!-- 费用发票子菜单 -->
        <menuitem id="hr_expense_line_category" name="费用发票" action="hr_expense_line_action"
            parent="hr_expense" sequence="0"/>
    </data>
</odoo>