Artisteer 2.5 archive.php with WP Pagenavi

<?php
get_header();
if (have_posts())
{
    $post = $posts[0];
    $title = '';
    if (is_category()){
        $title .= single_cat_title('', false);
    } elseif( is_tag() ) {
        $title .= sprintf(__('Posts Tagged &#8216;%s&#8217;', 'kubrick'), single_tag_title('', false) );
    } elseif( is_day() ) {
        $title .= sprintf(_c('Archive for %s|Daily archive page', 'kubrick'), get_the_date());
    } elseif( is_month() ) {
        $title .= sprintf(_c('Archive for %s|Monthly archive page', 'kubrick'), get_the_date('F Y'));
    } elseif( is_year() ) {
        $title .= sprintf(_c('Archive for %s|Yearly archive page', 'kubrick'), get_the_date('Y'));
    } elseif( is_author() ) {
        $title .= __('Author Archive', 'kubrick');
    } elseif( isset($_GET['paged']) && !empty($_GET['paged']) ) {
        $title .= __('Blog Archives', 'kubrick');
    }
    art_page_navi($title);
    while (have_posts())
    {
        art_post();
    }
    /* Start add page navigation to index page */
    if(function_exists('wp_pagenavi') ) {
        wp_pagenavi();
    } else {
    art_page_navi();
    }
    /* End add page navigation to index page */
} else {
    $title = '';
    if ( is_category() ) {
        $title .= sprintf(__("Sorry, but there aren't any posts in the %s category yet.", "kubrick"), single_cat_title('',false));
    } else if ( is_date() ) {
        $title .= __("Sorry, but there aren't any posts with this date.", "kubrick");
    } else if ( is_author() ) {
        $userdata = get_userdatabylogin(get_query_var('author_name'));
        $title .= sprintf(__("Sorry, but there aren't any posts by %s yet.", "kubrick"), $userdata->display_name);
    } else {
        $title .= __('No posts found.', 'kubrick');
    }
    art_post_box(
        $title,
        '<p class="center">' .  __('No posts found. Try a different search?', 'kubrick') . '</p>'
        .  "\r\n" .art_get_search());
}

get_footer();