ダッシュボードの「概要」にカスタム投稿タイプ件数を表示する

add_filter( 'dashboard_glance_items', 'mytheme_dashboard_glance_items' );
function mytheme_dashboard_glance_items( $elements ) {
	foreach ( array( 'food', 'drink' ) as $post_type ) {
		$num_posts = wp_count_posts( $post_type );
		if ( $num_posts && $num_posts->publish ) {
			$text = number_format_i18n( $num_posts->publish ).'件の投稿';
			$elements[] = sprintf( '<a href="edit.php?post_type=%1$s" class="%1$s-count">%2$s</a>', $post_type, $text );
		}
	}
	return $elements;
}

add_action( 'admin_print_styles', 'mytheme_dashboard_print_styles' );
function mytheme_dashboard_print_styles() {
?>
<style>
#dashboard_right_now li a.food-count:before { content: '\f232'; }
#dashboard_right_now li a.drink-count:before { content: '\f233'; }
</style>
<?php
}