Insert HTML before the Genesis structural wrap for the given contextual area.

before-structural-wrap.php

add_action( 'genesis_meta', 'process_structural_wrap_handler' );
/**
 * Process the structural wrap handler.
 *
 * @since 1.0.0
 *
 * @return void
 */
function process_structural_wrap_handler() {
	/**
	 * Filter the contextual areas to add the "before_genesis_{$context}_wrap" event
	 *
	 * @since 1.0.0
	 *
	 * @return array
	 */
	$structural_wraps = apply_filters( 'add_before_structural_wrap_context_filter', get_theme_support( 'genesis-structural-wraps' ) );
	if ( ! is_array( $structural_wraps ) || ! $structural_wraps[0] ) {
		return;
	}

	foreach( (array) $structural_wraps[0] as $context ) {
		add_filter( "genesis_structural_wrap-{$context}", 'do_before_structural_wrap_filter', 10, 2 );
	}

}

/**
 * Do the before Genesis structural {$context} wrap.
 *
 * @since 1.0.0
 *
 * @param string $output HTML output
 * @param string $original_output Original output
 *
 * @return string
 */
function do_before_structural_wrap_filter( $output, $original_output ) {
	if( 'open' != $original_output ) {
		return $output;
	}

	$context = str_replace( 'genesis_structural_wrap-', '', current_filter() );

	/**
	 * Fire the "before_genesis_{$context}_wrap" filter event, which will
	 * insert any returned HTML before the contextual area's `<div class="wrap">`.
	 *
	 * @since 1.0.0
	 *
	 * @param string $output HTML output
	 * @param string $context The contextual area
	 *
	 * @return string
	 */
	$before_wrap_html = apply_filters( "before_genesis_{$context}_wrap", $output, $context );

	return $before_wrap_html . $output;
}