Link Tags to Static Page

link_tags_to_static_page.php

<?php

/**
 * Filters tag links to point to a static page with the same title as the tag name.
 */
function link_tags_to_related_page($tagUrl, $tagId) {
    $tag = get_tag($tagId);
    $relatedPage = get_page_by_title($tag->name);
    if ($relatedPage) {
        $tagUrl = get_permalink($relatedPage->ID);
    }
    return $tagUrl;
}

add_filter('tag_link', 'link_tags_to_related_page', 10, 2);