bootstrap 3.x based wordpress pagination

pagination.php

    function nivo_pagination($pages = '', $range = 2){
        $showitems = ($range * 2)+1;
        global $paged;
        if(empty($paged)) $paged = 1;
        if($pages == '') {
            global $wp_query;
            $pages = $wp_query->max_num_pages;
            if(!$pages) { $pages = 1; }
        }

        if(1 != $pages) {
            echo "<nav><ul class=\"pagination\"><li><span>Sayfa ".$paged." / ".$pages."</span></li>";
            if($paged > 2 && $paged > $range+1 && $showitems < $pages) echo "<li><a href='".get_pagenum_link(1)."'>&laquo;</a></li>";
            if($paged > 1 && $showitems < $pages) echo "<li><a href='".get_pagenum_link($paged - 1)."'>&lsaquo;</a></li>";

            for ($i=1; $i <= $pages; $i++) {
                if (1 != $pages &&( !($i >= $paged+$range+1 || $i <= $paged-$range-1) || $pages <= $showitems )) {  
                    $next_link = '';
                    if($paged + 1 == $i)
                    $next_link = 'next_link';
                    echo ($paged == $i)? '<li class="active"><a href="#">'.$i.'</a></li>':"<li><a href='".get_pagenum_link($i)."' class=\"disabled ".$next_link." \">".$i."</a></li>";
                }
            }
            if ($paged < $pages && $showitems < $pages) echo "<li><a href=\"".get_pagenum_link($paged + 1)."\">&rsaquo;</a></li>";  
            if ($paged < $pages-1 &&  $paged+$range-1 < $pages && $showitems < $pages) echo "<li><a href='".get_pagenum_link($pages)."'>&raquo;</a></li>";
            echo "</ul></nav>\n";
        }
    }