Wordpress breadcrumbs without a plugin. REFERENCE: http://www.catswhocode.com/blog/how-to-breadcrumb-function-for-wordpress

wp-breadcrumbs-wo-plugin.php

// This goes in the functions.php file in your theme
<?php
function the_breadcrumb() {
	if (!is_home()) {
		echo '<a href="';
		echo get_option('home');
		echo '">';
		echo "Home";
		echo " / </a>";

		if (is_category() || is_single()) {
			the_category('title_li=');
			if (is_single()) {
				echo " / ";
				the_title();
			}
		} elseif (is_page()) {
			echo '<a href="';
			echo the_permalink();
			echo '">';
			echo the_title();
			echo "</a>";
		}
	}
}
?>

// Add this in your page templates where you want the breadcrumb to show up
<?php the_breadcrumb(); ?>