iluke

As of 2.7 update, the hack I posted is now around line 626 of the same file:

/**
 * Retrieve archive link content based on predefined or custom code.
 *
 * The format can be one of four styles. The 'link' for head element, 'option'
 * for use in the select element, 'html' for use in list (either ol or ul HTML
 * elements). Custom content is also supported using the before and after
 * parameters.
 *
 * The 'link' format uses the link HTML element with the <em>archives</em>
 * relationship. The before and after parameters are not used. The text
 * parameter is used to describe the link.
 *
 * The 'option' format uses the option HTML element for use in select element.
 * The value is the url parameter and the before and after parameters are used
 * between the text description.
 *
 * The 'html' format, which is the default, uses the li HTML element for use in
 * the list HTML elements. The before parameter is before the link and the after
 * parameter is after the closing link.
 *
 * The custom format uses the before parameter before the link ('a' HTML
 * element) and the after parameter after the closing link tag. If the above
 * three values for the format are not used, then custom format is assumed.
 *
 * @since 1.0.0
 * @author Orien
 * @link https://icecode.com/ link navigation hack by Orien
 *
 * @param string $url URL to archive.
 * @param string $text Archive text description.
 * @param string $format Optional, default is 'html'. Can be 'link', 'option', 'html', or custom.
 * @param string $before Optional.
 * @param string $after Optional.
 * @return string HTML link content for archive.
 */
function get_archives_link($url, $text, $format = 'html', $before = '', $after = '') {
	$text = wptexturize($text);
	$title_text = attribute_escape($text);
	$url = clean_url($url);

	// modified 2008-12-15 by luke wertz
	if ('link' == $format) {
		$link_html = "\t<link rel='archives' title='$title_text' href='$url' />\n";
	} elseif ('option' == $format) {
		$link_html = "\t<option value='$url'>$before $text $after</option>\n";
	} elseif ('html' == $format) {
		$requested = "https://{$_SERVER['SERVER_NAME']}{$_SERVER['REQUEST_URI']}";
		if ($requested == $url){ $class = " class='current-cat'"; } else { $class = null; }

		$link_html = "\t<li$class>$before<a href='$url' title='$title_text'>$text</a>$after</li>\n";
	} else { // custom
		$link_html = "\t$before<a href='$url' title='$title_text'>$text</a>$after\n";
	}

	$link_html = apply_filters( "get_archives_link", $link_html );

	return $link_html;
}

I was able to hack this up really quickly… be warned, this is mostly untested, but it should do what you want.

Find in /wp-includes/general-template.php line 352. It should be the get_archives_link function declaration… replace that function with this modified one:

/* link navigation hack by Orien https://icecode.com/ */
function get_archives_link($url, $text, $format = 'html', $before = '', $after = '') {
	$text = wptexturize($text);
	$title_text = attribute_escape($text);
	$url = clean_url($url);

	if ('link' == $format) {
		$link_html = "\t<link rel='archives' title='$title_text'  href='$url' />\n";
	} elseif ('option' == $format) {
		$link_html = "\t<option value='$url'>$before $text $after</option>\n";
	} elseif ('html' == $format) {
		$requested = "https://{$_SERVER['SERVER_NAME']}{$_SERVER['REQUEST_URI']}";
		if ($requested == $url){ $class = " class='current-cat'"; } else { $class = null; }

		$link_html = "\t<li$class>$before<a href='$url' title='$title_text'>$text</a>$after</li>\n";
	} else { // custom
		$link_html = "\t$before<a href='$url' title='$title_text'>$text</a>$after\n";
	}

	$link_html = apply_filters( "get_archives_link", $link_html );

	return $link_html;
}

For anyone who cares: all this is doing now is testing for the requested uri and checking it against the returned $url from the original function… it currently applies a class of current-cat to the <li>.

HTH.
Luke