Wordpress按字母顺序列出子页面

<?php
/*
Template Name: Alphabetic
*/
?>


<?php get_header(); ?>
<div class=\"container\">

    <div id=\"content\" role=\"main\">
    <h2 class=\"entry-title\"><?php the_title(); ?></h2>                              
        <?php

        $my_wp_query = new WP_Query();
        $all_wp_pages = $my_wp_query->query(array(\'post_type\' => \'page\'));

        $children = get_page_children($post->ID, $all_wp_pages);

        $letter=\"\";
        foreach ($children as $child)
        {
            $first_letter=substr($child->post_title,0,1);
            if($letter != $first_letter)
            {
                $alphabetic[]->post_title=$first_letter;
                $letter=$first_letter;
            }
            $alphabetic[]=$child;
        }

        ?>

        <table style=\"border:none;\">
            <tr>

            <?php

            $col = 4; //how many columns

            for($i = 0; $i < $col; $i++) {

                echo \'<td style=\"border:none;\">\';

                    $nr = (int)(sizeof($alphabetic)/4);
                    $i == $col - 1 ? $end = sizeof($alphabetic) : $end = $nr*($i+1);

                    for($j = $nr*$i; $j < $end; $j++) {
                        if(strlen($alphabetic[$j]->post_title)==1)
                            echo \'<b>\', $alphabetic[$j]->post_title, \'</b><br />\';
                        else
                            echo \'<a href=\"\'.get_permalink($alphabetic[$j]->ID).\'\">\'.$alphabetic[$j]->post_title.\'</a><br />\';
                    }

                echo \'</td>\';

            } ?>

            </tr>
        </table>

    </div><!-- #content -->
</div><!-- #container -->

<?php get_sidebar(); ?>
<?php get_footer(); ?>