Ticket #12158: wp_link_pages.diff

post-template.php

@@ -566 +566 @@
         );
 
         $r = wp_parse_args( $args, $defaults );
+        $r = apply_filters( 'wp_link_pages_args', $r );
         extract( $r, EXTR_SKIP );
 
         global $post, $page, $numpages, $multipage, $more, $pagenow;