website_custom_pricelist/view/res_config.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
	<data>

		<record id="view_website_config_settings_pricelist_ept" model="ir.ui.view">
			<field name="name">Website Pricelist settings</field>
			<field name="model">website.config.settings</field>
			<field name="inherit_id" ref="website.view_website_config_settings" />
			<field name="arch" type="xml">
				<xpath expr="//group[@string='Social Media']" position="after">
					<group string="Website Prices">
						<label for="pricelist_id" />
						<div name="pricelist_id">
							<div>
								<div name="pricelist_id" class="oe_inline">
									<field name="pricelist_id" widget="selection"/>
								</div>
							</div>
						</div>
					</group>
				</xpath>
			</field>
		</record>
	</data>
</openerp>