add-row-markup.php

<?php

add_filter( 'cherry_shortcodes_output', 'themeXXXX_row_add_tags', 10, 3 );

/**
 * Add custom markup inside row shortcode.
 *
 * @param  string $output    shortcode content.
 * @param  array  $atts      attributes array.
 * @param  string $shortcode shortcode name.
 * @return string
 */
function themeXXXX_row_add_tags( $output, $atts, $shortcode ) {

	if ( 'row' !== $shortcode ) {
		return $output;
	}

	if ( ! isset( $atts['style'] ) || 'light' !== $atts['style'] ) {
		return $output;
	}

	$tags = '<div class="test-1"></div><div class="test-2"></div>';
	$output = preg_replace( '/(<\/div>)$/', $tags . '$1', $output );

	return $output;
}