remove-theme-name-from-at-a-glance.php

<?php

function at_a_glance_override() {
	ob_start();
	wp_dashboard_right_now();
	$contents = ob_get_clean();

	echo preg_replace('#.*themes\.php.*#', '', $contents);
}

function wp_dashboard_setup_at_a_glance_override() {
	if(is_blog_admin() && current_user_can('edit_posts')) {
		remove_meta_box('dashboard_right_now', get_current_screen(), 'normal');
		wp_add_dashboard_widget('dashboard_right_now_override', __('At a Glance'), 'at_a_glance_override');
	}
}
add_action('wp_dashboard_setup', 'wp_dashboard_setup_at_a_glance_override');

This doesn't quite work. All the links are present but the formatting and icons are all removed. Any ideas on how to rectify this? Thanks.