install.xml

<modification>
    <name>Wirecard Payment Processing Gateway</name>
    <version>1.0.0</version>
    <author>Wirecard</author>
    <code>WirecardPG</code>
    <file path="admin/controller/common/column_left.php">
        <operation>
            <search><![CDATA[$design = array();]]></search>
            <add position="before"><![CDATA[
                $data['menus'][] = array(
					'id'       => 'menu-wirecard',
					'icon'	   => 'fa-money',
					'name'	   => $this->language->get('heading_title'),
					'href'     => $this->url->link('extension/module/wirecard_pg', 'user_token=' . $this->session->data['user_token'], 'SSL'),
					'children' => array()
				);
                ]]></add>
        </operation>

        <operation>
            <search><![CDATA[$this->load->language('common/column_left');]]></search>
            <add position="before"><![CDATA[
                $this->load->language('extension/payment/wirecard_pg');
            ]]></add>
        </operation>
    </file>
</modification>