partner-contact/crm_department/views/crm_department_view.xml

<?xml version="1.0"?>
<openerp>
    <data>

        <record id="crm_department_action" model="ir.actions.act_window">
            <field name="name">Departments</field>
            <field name="res_model">crm.department</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree</field>
        </record>

        <record id="crm_department_tree_view" model="ir.ui.view">
            <field name="name">CRM department tree</field>
            <field name="model">crm.department</field>
            <field name="arch" type="xml">
                <tree string="Departments" editable="bottom">
                    <field name="name"/>
                    <field name="parent_id"/>
                </tree>
            </field>
        </record>

        <menuitem action="crm_department_action"
                  id="menu_crm_department"
                  name="Departments"
                  parent="base.menu_crm_config_lead"
                  sequence="3"/>

    </data>
</openerp>