pmpro_addons_shortcode.php

<?php
//shop page for add ons
function pmpro_addons_shortcode($atts, $content=null, $code="")
{
	ob_start();	
	global $wpdb, $post, $current_user, $pmpro_currency_symbol; 
	?>
	<div id="pmpro_addons">
	<?php
		$count = 0;
		// get posts
		query_posts(array("meta_key"=>"_pmproap_price", "meta_compare"=>"!=", "meta_value"=>"", "showposts"=>-1, "orderby"=>"menu_order", "order"=>"ASC"));
		global $wp_query;		
		if ( have_posts() ) : while ( have_posts() ) : the_post();	
			$pmproap_price = get_post_meta($post->ID, "_pmproap_price", true);
			if(empty($pmproap_price))
				continue;
			?>
			<div class="pmpro_addon one_third<?php if($count % 3 == 2) { ?>_last<?php } ?>">
				<h3><?php the_title(); ?></h3>
				<h4><?php echo $pmpro_currency_symbol . $pmproap_price; ?></h4>
				<a class="pmpro_btn" href="<?php echo pmpro_url("checkout", "?level=" . $text_level_id . "&ap=" . $post->ID); ?>">Buy Now</a>
			</div> <!-- end pmpro_addon, one_third-->
			<?php
			$count++;
		endwhile; endif; wp_reset_query();
	?>
	</div> <!-- end #pmpro_addons -->
	<?php
	$temp_content = ob_get_contents();
	ob_end_clean();
	return $temp_content;
}
add_shortcode("pmpro_addons", "pmpro_addons_shortcode");
?>