invalid nested category HTML list in admin

[082net]

'dropdown_categories' function in wp-admin/includes/template.php returns invalid html list

<ul>
 <li>a</li>
 <li>b</li>
 <ul>
  <li>b-1</li>
  <li>b-2</li>
 </ul>
<li>c</li>
</ul>

It should be

<ul>
 <li>a</li>
 <li>b
 <ul>
  <li>b-1</li>
  <li>b-2</li>
 </ul>
 </li>
<li>c</li>
</ul>

We just need to print '</li>' after child list if a category has children.

function write_nested_categories( $categories ) {
	foreach ( $categories as $category ) {
		echo '<li id="category-', $category['cat_ID'], '"><label for="in-category-', $category['cat_ID'], '" class="selectit"><input value="', $category['cat_ID'], '" type="checkbox" name="post_category[]" id="in-category-', $category['cat_ID'], '"', ($category['checked'] ? ' checked="checked"' : "" ), '/> ', wp_specialchars( apply_filters('the_category', $category['cat_name'] )), "</label>";

		if ( $category['children'] ) {
			echo "<ul>\n";
			write_nested_categories( $category['children'] );
			echo "</ul>\n";
		}
		echo "</li>";
	}
}

It displayed well on blog, but while I was trying to make 'AJAX category adder for specific parent category', it matters.

[JeremyVisser]

Thanks for your contributions to WordPress.

First, we will apply the patch to 2.4 (trunk), then backport it to 2.3 if we deem it to be important enough.

[matt]

(In [6392]) Invalid HTML in nested category checkbox list. Also cleans up source formatting a bit. Fixes #5462. Hat tip: 082net.