//Functions.php
			add_action( 'init', 'downwards_create_taxonomies' );
			function downwards_create_taxonomies() {
				// portfolio taxonomies
				$cat_labels = array(
					'name' => __( 'Portfolio Categories', '' ),
					'singular_name' => __( 'Portfolio Category', '' ),
					'search_items' =>  __( 'Search Portfolio Categories', '' ),
					'all_items' => __( 'All Portfolio Categories', '' ),
					'parent_item' => __( 'Parent Portfolio Category', '' ),
					'parent_item_colon' => __( 'Parent Portfolio Category:', '' ),
					'edit_item' => __( 'Edit Portfolio Category', '' ),
					'update_item' => __( 'Update Portfolio Category', '' ),
					'add_new_item' => __( 'Add New Portfolio Category', '' ),
					'new_item_name' => __( 'New Portfolio Category Name', '' ),
					'choose_from_most_used'	=> __( 'Choose from the most used portfolio categories', '' )
				);

				register_taxonomy('portfolio-category','portfolio',array(
					'hierarchical' => true,
					'labels' => $cat_labels,
					'query_var' => true,
					'rewrite' => array( 'slug' => 'portfolio-category' ),
				));
			}

//Calling Taxonomy In Theme
<?php
		$cats = get_terms('portfolio-category');
		if($cats[0]) { ?>
        <div id="filter">
            <li><a href="#" class="active" data-filter="*"><span><?php _e('All', 'downwards') . '/'; ?></span></a></li>
            <?php
            foreach ($cats as $cat ) : ?>
            <li><a href="#" data-filter=".<?php echo $cat->slug; ?>"><span><?php echo '/ ' . $cat->name;  ?></span></a></li>
            <?php endforeach; ?>
        </div>
	<?php } ?>

	<div id="p_container_2">
	<?php query_posts(array( 'post_type' => 'portfolio' )); ?>
    <?php while (have_posts()) : the_post(); $terms = get_the_terms( get_the_ID(), 'portfolio-category' ); ?>
    	<div class="p_brick_2 <?php if($terms) foreach ($terms as $term) echo $term->slug .' '; ?>">
        <a href="<?php the_permalink(); ?>"><?php if ( has_post_thumbnail()) : the_post_thumbnail('port-post-2'); endif; ?></a>
            <div class="p_brick_2_c">
            <h2><?php the_title(); ?></h2>
            <p><?php echo get_the_term_list( $post->ID, 'portfolio-category', '', ' / ', '', '' ); ?></p>
            </div>

    	</div>
      <?php endwhile; ?>