]*wp-block-group(\s|")[^>]*>)(\s*]*wp-block-group__inner-container(\s|")[^>]*>)((.|\S|\s)*)/'; if ( 'core/group' !== $block['blockName'] || 1 === preg_match( $group_with_inner_container_regex, $block_content ) ) { return $block_content; } $replace_regex = '/(^\s*]*wp-block-group[^>]*>)(.*)(<\/div>\s*$)/ms'; $updated_content = preg_replace_callback( $replace_regex, function( $matches ) { return $matches[1] . '

' . $matches[2] . '

' . $matches[3]; }, $block_content ); return $updated_content; } add_filter( 'render_block', 'wp_restore_group_inner_container', 10, 2 );