如何将附件图像链接到其类别？

function wp_attachment_image($size = thumb) {
    if($images = get_children(array(
        \'post_parent\'    => get_the_ID(),
        \'post_type\'      => \'attachment\',
        \'numberposts\'    => -1, // show all
        \'post_status\'    => null,
        \'post_mime_type\' => \'image\',
    ))) {
        foreach($images as $image) {
            $attimg   = wp_get_attachment_image($image->ID,$size);
            $atturl   = wp_get_attachment_url($image->ID);
            $attlink  = get_attachment_link($image->ID);
            $postlink = get_permalink($image->post_parent);
            $atttitle = apply_filters(\'the_title\',$image->post_title);

            echo \'<a href="\'.$postlink.\'">\'.$attimg.\'</a>\';
        }
    }
}
wp_attachment_image(\'thumb\');