WordPress at a glance
filter is not described

wp_list_bookmarks filter-hook . WP 2.5.0

Filters the bookmarks list before it is echoed or returned.

Usage

add_filter( 'wp_list_bookmarks', 'filter_function_name_2733' );
function filter_function_name_2733( $html ){
	// filter...

	return $html;
}
$html(string)
The HTML list of bookmarks.

Where the hook is called

wp_list_bookmarks()
wp-includes/bookmark-template.php 298
$html = apply_filters( 'wp_list_bookmarks', $output );

Where the hook is used (in WP core)

Does not used.