<?php foreach ( $this->template_tag_handler->get_groups() as $group_slug => $group_label ) : ?>
                    <li class="template-tag-list-group <?php echo esc_attr( 'template-tag-list-group-' . $group_slug ); ?>">
                        <span><?php echo esc_html( $group_label ); ?></span>
                        <ul>
                            <?php foreach ( $this->template_tag_handler->get_tag_labels( $group_slug ) as $tag_slug => $tag_label ) : ?>