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filter is not described

navigation_markup_template filter-hook . WP 4.4.0

Filters the navigation markup template.

Note: The filtered template HTML must contain specifiers for the navigation class (%1$s), the screen-reader-text value (%2$s), and placement of the navigation links (%3$s):

<nav class="navigation %1$s" role="navigation">
	<h2 class="screen-reader-text">%2$s</h2>
	<div class="nav-links">%3$s</div>
</nav>

Usage

add_filter( 'navigation_markup_template', 'filter_function_name_2714', 10, 2 );
function filter_function_name_2714( $template, $class ){
	// filter...

	return $template;
}
$template(string)
The default template.
$class(string)
The class passed by the calling function.

Where the hook is called

_navigation_markup()
wp-includes/link-template.php 2609
$template = apply_filters( 'navigation_markup_template', $template, $class );

Where the hook is used (in WP core)

Does not used.