wordpress-parent-child-category-list

	$taxonomy = 'blog-category';
	$terms = get_terms(
		$taxonomy,
		array(
 			'hide_empty'    => 1,
 			'parent'    	=> 0
		)
	);
	// 'parent'    => 0
	if ($terms) {

		echo "<ul class='tax-parent'>";

		foreach($terms as $term) {

			// http://codex.wordpress.org/Function_Reference/get_term_link

			echo "
					<li>
						";
							echo "<h4><a href='" . get_term_link( $term ) . "' title='" . sprintf( __( "View all products in %s" ), $term->name ) . "' class='parent-link'>".$term->name."</a></h4>";

								$terms_child = get_term_children($term->term_id, $taxonomy);

								if ($terms_child) {

									echo "<ul class='tax-child'>";

										for($i = 0; $i < count($terms_child); $i++) {

											echo "<li>";
												$quantityTermObject 	= get_term_by( 'id', $terms_child[$i], 'blog-category' ); // object

												$child_category_url		= get_term_link( $quantityTermObject );

												echo "• <a href='".$child_category_url."'>";
													echo $quantityTermObject->name;
												echo "</a>";
											echo "</li>";

										}

									echo "</ul>";

								}



					echo "</li>
				";
		}

		echo "</ul>";

	}