<?php
/*
Template Name: Columns of Children
*/

get_header(); ?>

        <div id="primary">
            <div id="content" role="main">

                <?php if(wp_list_pages("child_of=".$post->ID."&echo=0")) { ?>

                    <?php //to auto break list of pages into colunms
                        $list = wp_list_pages('title_li=&depth=1&echo=0&child_of='.$post->ID.'&sort_column=menu_order');//keep 'echo=0' and 'depth=1'; add all your parameters;
                        $list_elements = explode('', $list);
                        $num = count($list_elements)-1;\
                        $col = 3; //SET THE NUMBER OF COLUMNS
                        $num_col = ceil($num/$col);

                        $width = floor(100/$col)-5;
                        $style = 'width:'.$width.'%;margin-right:2%;padding-left:3%;float:left;';

                        for( $i=1; $i<$col; $i++) { $list_elements[$i*$num_col] = '<ul style="'.$style.'">'.$list_elements[$i*$num_col]; }
                            $list = implode('', $list_elements); ?>

                        <ul class="page-list-columns" style=" <?php echo $style; ?>">
                            <?php echo $list; ?>

                        <div style="clear:both;width:100%;display:block;"> </div>
                <?php } ?>

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

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