カテゴリ一覧用ショートコード

category_list.php

<?php
function category_list( $atts ) {

  extract( shortcode_atts( array(
		'post_type'	=>	'post',
		'cat_name'	=>	'',
		'num'		=>	3,
		'class'		=>	'relational_lists',
		'orderby'		=>	'date',
	), $atts ) );
	
	global $post;
	$args = array(
	  'post_type'		=>	$post_type,
	  'category_name'	=>	$cat_name,
	  'numberposts'		=>	$num,
	  'orderby'			=>	$order,
	);
	$relational_posts = get_posts( $args );
	setup_postdata( $post );
		$html = '';
		foreach( $relational_posts as $post ) {
		$post_date = get_the_time( 'Y年m月d日', $post->ID );
		$post_link = get_permalink( $post->ID );
		$post_title = get_the_title( $post->ID );
		$html .= '<li><span>' . $post_date . '</span><a href="' . $post_link . '">' . $post_title . '</a></li>';
	}
	wp_reset_postdata();
	return "<ul class='$class'>" . $html . "</ul>";
	
} 
add_shortcode( 'cat_list', 'category_list' );

// add widget area
add_filter('widget_text', 'do_shortcode');

うへ…(^0^;)
orderとorderbyが。。。