partner-contact/base_location/state_view.xml

<?xml version="1.0"?>
<openerp>
  <data>
    <!-- Add cities to the State form -->
    <record model="ir.ui.view" id="view_country_state_form2">
      <field name="name">view_country_state_form2</field>
      <field name="model">res.country.state</field>
      <field name="inherit_id" ref="base.view_country_state_form"/>
      <field name="arch" type="xml">
        <field name="country_id" position="after">
          <field name="better_zip_ids"
                 context="{'country_id': country_id}"
                 colspan="4"
                 nolabel="1">
            <tree editable="top">
              <field name="name"/>
              <field name="code"/>
              <field name="city"/>
              <field name="country_id"/>
            </tree>
          </field>
        </field>
      </field>
    </record>
  </data>
</openerp>