[Plugin: jQuery Mega Menu ] modify to show latest post

There’s a way to modify this dropdown menu plugin so it can show just the latest post? i already have the code, i don’t where to put it ??

<ul> 

<?php $my_query = new WP_Query('category_name=ideas&showposts=5'); ?><?php while ($my_query->have_posts()) : $my_query->the_post(); ?><li><a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></li><?php endwhile; ?>

<li><a href="https://www.inspirates.net/category">MORE...</a></li>
</ul>