bbp_restore_all_filters( string $tag, int $priority = false )

function bbp_restore_all_filters( $tag, $priority = false ) {
	global $wp_filter, $merged_filters;

	$bbp = bbpress();

	// Filters exist
	if ( isset( $bbp->filters->wp_filter[$tag] ) ) {

		// Filters exist in this priority
		if ( !empty( $priority ) && isset( $bbp->filters->wp_filter[$tag][$priority] ) ) {

			// Store filters in a backup
			$wp_filter[$tag][$priority] = $bbp->filters->wp_filter[$tag][$priority];

			// Unset the filters
			unset( $bbp->filters->wp_filter[$tag][$priority] );

		// Priority is empty
		} else {

			// Store filters in a backup
			$wp_filter[$tag] = $bbp->filters->wp_filter[$tag];

			// Unset the filters
			unset( $bbp->filters->wp_filter[$tag] );
		}
	}

	// Check merged filters
	if ( isset( $bbp->filters->merged_filters[$tag] ) ) {

		// Store filters in a backup
		$merged_filters[$tag] = $bbp->filters->merged_filters[$tag];

		// Unset the filters
		unset( $bbp->filters->merged_filters[$tag] );
	}

	return true;
}