public function panel_content() {

            echo '<p class="form-field"><label for="wpf-apply-tags-woo">Apply tags when purchased</label>';
            echo '<p class="form-field"><label for="wpf-apply-tags-woo">Apply tags when refunded</label>';

            global $post;
            $settings = array('apply_tags' => array());

            if(get_post_meta( $post->ID, 'wpf-settings-woo', true ))
                $settings = array_merge($settings, get_post_meta( $post->ID, 'wpf-settings-woo', true ));

            wpf_render_tag_multiselect($settings['apply_tags'], 'wpf-settings-woo', 'apply_tags');

            echo '<small class="show_if_variable">Tags for product variations can be configured within the Variations tab.</small>';

            echo '</p>';

        }