PHP – WordPress – Filter Category

The given PHP example filter out a category from your WordPress.
Add this code to your functions.php file.

Code Example:

<?php
# The Number 312 is my category ID number. Please replace this with your own!
# Add this code to your functions.php file.

function exclude_cat($query) {
	if ( $query->is_home) {
		$query-> set('cat','-312');
	}
	return $query;
}

add_filter('pre_get_posts','exclude_cat');
?>