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Your problem is two-fold: 1) It is imperitive you stop using query_posts. There are many well-documented reasons as to why using this function needs to end, but I think <a href="https://wordpress.stackexchange.com/questions/1753/when-should-you-use-wp-query-vs-query-posts-vs-get-posts">this is the best explanation</a>. 2) You aren't resetting your query. More on that in a minute. Going back to number 1, the problem with query_posts is that it affects the global $wp_query object. This would be fine if your intention was to modify the main loop, but that's not what you're trying to do here. What you need to use is <a href="http://codex.wordpress.org/Class_Reference/WP_Query" rel="nofollow noreferrer">WP Query</a>. The syntax in creating a new Query Object is identical to query_posts, but the benefit is that you are no longer affecting the global instance of $wp_query. Resetting your query also ensures that no other sections of code utilizing a Wordpress Query are going to be affected by your Query Object. Try changing your code example to this: <pre><code><?php $query = new WP_Query(array('category_name'=>'left_sidebar','posts_per_page'=>4,'orderby=menu_order')); if($query->have_posts()) : while($query->have_posts()) : $query->the_post(); ?> <li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li> <?php endwhile;endif; wp_reset_postdata(); ?> </code></pre>
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1. CO+1 Good answer and great link to the Wordpress Stackexchange thread, 1st time I've seen that. That's such a good answer I can even pretend the flowchart hasn't been done in Comic sans :)
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Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.