Wordpress - Category list order in post edit page

I want to stop WordPress re-ordering the category list in the admin > post edit page. The default behaviour is to take the categories assigned to the post out of their natur开发者_开发百科al parent/child flow and put them at the top of the list. I want to stop this happening as it is confusing when the category structure is big.

Any thoughts?

Thanks.

While the above are great alternative solutions, especially if you want more control over the taxonomy checklist metabox, I think the simplest solution would be the following:

function taxonomy_checklist_checked_ontop_filter ($args)
{

    $args['checked_ontop'] = false;
    return $args;

}

add_filter('wp_terms_checklist_args','taxonomy_checklist_checked_ontop_filter');

And that should take care of that!

What version of Wordpress are you using? Wordpress 3.04 provides the Parent/Child tree on the Post Edit page. Are you sure you also aren't viewing the "Most Used" tab?

Nevermind, I see exactly the problem you are talking about, which show up after the post is saved:

Alright, try pasting this into the functions.php in your theme:

// remove the old box
function remove_default_categories_box() {
    remove_meta_box('categorydiv', 'post', 'side');
}
add_action( 'admin_head', 'remove_default_categories_box' );

// add the new box
function add_custom_categories_box() {
    add_meta_box('customcategorydiv', 'Categories', 'custom_post_categories_meta_box', 'post', 'side', 'low', array( 'taxonomy' => 'category' ));
}
add_action('admin_menu', 'add_custom_categories_box');

/**
 * Display CUSTOM post categories form fields.
 *
 * @since 2.6.0
 *
 * @param object $post
 */
function custom_post_categories_meta_box( $post, $box ) {
    $defaults = array('taxonomy' => 'category');
    if ( !isset($box['args']) || !is_array($box['args']) )
        $args = array();
    else
        $args = $box['args'];
    extract( wp_parse_args($args, $defaults), EXTR_SKIP );
    $tax = get_taxonomy($taxonomy);

    ?>
    <div id="taxonomy-<?php echo $taxonomy; ?>" class="categorydiv">
        <ul id="<?php echo $taxonomy; ?>-tabs" class="category-tabs">
            <li class="tabs"><a href="#<?php echo $taxonomy; ?>-all" tabindex="3"><?php echo $tax->labels->all_items; ?></a></li>
            <li class="hide-if-no-js"><a href="#<?php echo $taxonomy; ?>-pop" tabindex="3"><?php _e( 'Most Used' ); ?></a></li>
        </ul>

        <div id="<?php echo $taxonomy; ?>-pop" class="tabs-panel" style="display: none;">
            <ul id="<?php echo $taxonomy; ?>checklist-pop" class="categorychecklist form-no-clear" >
                <?php $popular_ids = wp_popular_terms_checklist($taxonomy); ?>
            </ul>
        </div>

        <div id="<?php echo $taxonomy; ?>-all" class="tabs-panel">
            <?php
            $name = ( $taxonomy == 'category' ) ? 'post_category' : 'tax_input[' . $taxonomy . ']';
            echo "<input type='hidden' name='{$name}[]' value='0' />"; // Allows for an empty term set to be sent. 0 is an invalid Term ID and will be ignored by empty() checks.
            ?>
            <ul id="<?php echo $taxonomy; ?>checklist" class="list:<?php echo $taxonomy?> categorychecklist form-no-clear">
                <?php 
                /**
                 * This is the one line we had to change in the original function
                 * Notice that "checked_ontop" is now set to FALSE
                 */
                wp_terms_checklist($post->ID, array( 'taxonomy' => $taxonomy, 'popular_cats' => $popular_ids, 'checked_ontop' => FALSE ) ) ?>
            </ul>
        </div>
    <?php if ( !current_user_can($tax->cap->assign_terms) ) : ?>
    <p><em><?php _e('You cannot modify this taxonomy.'); ?></em></p>
    <?php endif; ?>
    <?php if ( current_user_can($tax->cap->edit_terms) ) : ?>
            <div id="<?php echo $taxonomy; ?>-adder" class="wp-hidden-children">
                <h4>
                    <a id="<?php echo $taxonomy; ?>-add-toggle" href="#<?php echo $taxonomy; ?>-add" class="hide-if-no-js" tabindex="3">
                        <?php
                            /* translators: %s: add new taxonomy label */
                            printf( __( '+ %s' ), $tax->labels->add_new_item );
                        ?>
                    </a>
                </h4>
                <p id="<?php echo $taxonomy; ?>-add" class="category-add wp-hidden-child">
                    <label class="screen-reader-text" for="new<?php echo $taxonomy; ?>"><?php echo $tax->labels->add_new_item; ?></label>
                    <input type="text" name="new<?php echo $taxonomy; ?>" id="new<?php echo $taxonomy; ?>" class="form-required form-input-tip" value="<?php echo esc_attr( $tax->labels->new_item_name ); ?>" tabindex="3" aria-required="true"/>
                    <label class="screen-reader-text" for="new<?php echo $taxonomy; ?>_parent">
                        <?php echo $tax->labels->parent_item_colon; ?>
                    </label>
                    <?php wp_dropdown_categories( array( 'taxonomy' => $taxonomy, 'hide_empty' => 0, 'name' => 'new'.$taxonomy.'_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => '&mdash; ' . $tax->labels->parent_item . ' &mdash;', 'tab_index' => 3 ) ); ?>
                    <input type="button" id="<?php echo $taxonomy; ?>-add-submit" class="add:<?php echo $taxonomy ?>checklist:<?php echo $taxonomy ?>-add button category-add-sumbit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" tabindex="3" />
                    <?php wp_nonce_field( 'add-'.$taxonomy, '_ajax_nonce-add-'.$taxonomy, false ); ?>
                    <span id="<?php echo $taxonomy; ?>-ajax-response"></span>
                </p>
            </div>
        <?php endif; ?>
    </div>
    <?php
}

The only real change was adding 'checked_ontop' => FALSE to the args in wp_terms_checklist() function in the middle of that mess. Everything else is the original post_categories_meta_box() function.

(You could just modify the original post_categories_meta_box() in /wp-admin/includes/meta-boxes.php, but it is not recommended to mess with core and adding/removing actions as above is the proper way to do it.

There's a plugin that does just this http://wordpress.org/extend/plugins/category-checklist-tree/