Paginatie pagina cu custom post types (Ex: Portofolio)

gistfile1.txt

<ul>
<?php
        global $paged, $wp_query, $wp;
        if  ( empty($paged) ) {
                if ( !empty( $_GET['paged'] ) ) {
                        $paged = $_GET['paged'];
                } elseif ( !empty($wp->matched_query) && $args = wp_parse_args($wp->matched_query) ) {
                        if ( !empty( $args['paged'] ) ) {
                                $paged = $args['paged'];
                        }
                }
                if ( !empty($paged) )
                        $wp_query->set('paged', $paged);
        }      
        $temp = $wp_query;
        $wp_query= null;
        $wp_query = new WP_Query();
        $wp_query->query('paged='.$paged.'&post_type=aktualnosci&showposts=3');
?>
<?php while ($wp_query->have_posts()) : $wp_query->the_post(); ?>
        <li> something here </li>
<?php endwhile; ?>
</ul>
<div class="pag">
        <div class="numbers">
                <div><?php previous_posts_link('<span class="prev">&nbsp;</span>') ?></div>
                <div><?php next_posts_link('<span class="next">&nbsp;</span>') ?></div>
        </div>
</div>
<?php $wp_query = null; $wp_query = $temp;?>