我如何根据wordpress中的类别对数据进行排序？

Being a newbie I am not able to know how to sort my posts based on categories which I have created in WordPress. I am getting my all posts because of the following code mentioned on image:

<?php $recent = new WP_Query(
"post_type=post&posts_per_page=6&orderby=date&order=DESC"); 
>

Navigation bar is my categories. So on clicking each category I should get posts relevant to that category only. For example clicking on Recipes, I should get all posts related to recipes only. Please suggest me plugins (jQuery) to give that tab the kind of functionality and how I am gonna implement this sort or filter sort of functionality in WordPress. Please help me with some code. Any help would be appreciated.

For best of my knowledge and if I m guessing you right. make category.php(For wordpress post) or taxonomy.php(for custom post type taxonomy)

How about adding the category as a menu.

try this:

$wpq = array( 
    'orderby' => 'date',
    'order' => 'DESC',
    'posts_per_page' => 6,
    'post_type' => 'post',
    'taxonomy' => 'category', 
    'term' => 'category-slug' 
);
$recent = new WP_Query ($wpq);

NOTE: change 'category-slug' with correct Category slug