我构建了一个特定的页面，只显示特定子类别中的帖子。我想把每月档案放在右边，但只与那些特定的儿童类别相关。

到目前为止，我有这个，但是它忽略了的child\\u并显示所有内容。

<?php $arc = array(
\'type\'            => \'monthly\',
\'limit\'           => \'\',
\'format\'          => \'html\', 
\'before\'          => \'\',
\'after\'           => \'\',
\'show_post_count\' => false,
\'echo\'            => 1,
\'order\'           => \'DESC\',
\'child_of\' => 19);?>
<?php wp_get_archives( $arc ); ?> 

<div class="container">
<div class="row">
    <div class="col-lg-7 col-md-7 col-sm-8">
        <h1 class="entry-title-big">Knowledge</h1>
        <?php
            $catquery = new WP_Query( \'category_name=knowledge\' );
            while($catquery->have_posts()) : $catquery->the_post();
        ?>
            <article class="articlePost clearfix">
                <?php if ( has_post_thumbnail() && ! post_password_required() && !is_single() ) : ?>
                <div class="entry-thumbnail col-lg-5 col-md-5 col-sm-5">
                    <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
                        <?php the_post_thumbnail(\'full\', array(\'class\' => \'img-responsive\'));   ?>
                    </a>
                </div>
                <?php endif; ?>
                <div class="clearfix postDets">
                    <div class="the-date"><?php the_time(\'F j, Y\'); ?></div>
                    <div class="the-categories">
                        <?php                           
                            $categories = get_the_category();
                            $separator = \' \';
                            $output = \'\';
                            if($categories){
                            foreach($categories as $category) {
                            $output .= \'<a class="feedcat" href="\'.get_category_link( $category->term_id ).\'" title="\' . esc_attr( sprintf( __( "View all posts in %s" ), $category->name ) ) . \'">\'.$category->cat_name.\'</a>\'.$separator;
                            }
                            echo trim($output, $separator);
                            }
                        ?>
                    </div>
                </div>

                <a href="<?php the_permalink() ?>" rel="bookmark" class="entry-title"><?php the_title(); ?></a>
                <?php the_excerpt(); ?>
                <a class="read-more" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
                    Read More...
                </a>
            </article>
        <?php endwhile; ?>

        <?php wp_reset_query(); ?> 
    </div>

    <aside id="serSideBar" class="col-lg-4 col-lg-offset-1 col-md-4 col-md-offset-1 col-sm-4">
        <div id="catsWidget">
            <h2>Categories</h2>
            <ul>
                <?php

                $args = array(
                  \'orderby\' => \'name\',
                  \'order\' => \'ASC\',
                  \'child_of\' => 19
                  );
                $categories = get_categories($args);
                  foreach($categories as $category) { 
                    echo \'<li class="cat-item"><a href="\' . get_category_link( $category->term_id ) . \'" title="\' . sprintf( __( "View all posts in %s" ), $category->name ) . \'" \' . \'>\' . $category->name.\'</a>\';
                    echo \'(\'. $category->count . \')</li>\';  } 
                ?>
            </ul>
        </div>
        <div id="arcWidget">
            <?php $arc = array(
                \'type\'            => \'monthly\',
                \'limit\'           => \'\',
                \'format\'          => \'html\', 
                \'before\'          => \'\',
                \'after\'           => \'\',
                \'show_post_count\' => false,
                \'echo\'            => 1,
                \'order\'           => \'DESC\',
                \'child_of\' => 19
            ); ?>           
            <?php wp_get_archives( $arc ); ?> 
        </div>
    </aside>
</div>