Ionut Staicu

Ever had to manage a WP install with many pages and subpages? This plugin does nothing more than adding a metabox to every post type that is hierarchical (that is pages and any other custom post type!) with a list of all page siblings, starting with the parent, so you can have:
<pre><code>News
|— History
|— Our Staff
|—— Employment Opportunities
|— Our Company
</code></pre>
Bonus: when you’re listing posts on admin pages, you can also choose to display only parents.
<h3>API</h3>
You can choose to disable some (or all!) functionality by using filters. These filters are as following:
Disable page siblings metabox completely:
<pre><code>add_filter('iamntz/page-siblings/add-page-metabox', '__return_false')
</code></pre>
For <code>my-custom-post-type</code>
<pre><code>add_filter("iamntz/page-siblings/add-page-metabox/post-type=my-custom-post-type", '__return_false')
</code></pre>
Disable the dropdown that will allow you to filter page parents or page parents & children
<pre><code>add_filter('iamntz/page-siblings/add-hierarchy-column-filter', '__return_false')
</code></pre>
For <code>my-custom-post-type</code>:
<pre><code>add_filter('iamntz/page-siblings/add-hierarchy-column-filter/post-type=my-custom-post-type', '__return_false')
</code></pre>
Set the default value for the dropdown:
<pre><code>add_filter('iamntz/page-siblings/add-hierarchy-column-filter', function() { return 'parents_only'; })
</code></pre>
For <code>my-custom-post-type</code>:
<pre><code>// The allowed values are `all` and `parents_only`.
add_filter('iamntz/page-siblings/hierarchy-column-filter-default/post-type=my-custom-post-type', function() { return 'parents_only'; })
</code></pre>

Page Siblings

A metabox with all page edit (and any other hierarchal post types) that display an edit link to its siblings.

Because there are some dumbasses out there who believe that’s ok to let the user guess the page IDs, you will find a new page under tools menu that will help you with this. Enjoy!

Page Siblings vs Get page IDs