odoo/addons/document_ftp/res_config_view.xml

<openerp>
    <data>
	    	
        <record id="view_document_ftp_configuration" model="ir.ui.view">
            <field name="name">Knowledge Application</field>
            <field name="model">knowledge.configuration</field>
            <field name="type">form</field>
            <field name="inherit_id" ref="document.view_knowledge_configuration"/>
            <field name="arch" type="xml">
                <xpath expr="//field[@name='module_document_ftp']" position="after">
                    <group  colspan="2" col="2">
                        <field name="url" widget="url" colspan="2"/>
                    </group>
                </xpath>
            </field>
        </record>
    </data>
</openerp>