Member Category Tax Query
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'member_category', 'terms' => array( '24', '5', '26', '6', '27', '30', '31', '32', '34', '35', '36', '8', '37', '23', '10', '39', '40', '41', '42', '43', '46', '48', '49', '12', '50' ), 'field' => 'term_id', 'operator' => 'IN', 'include_children' => true, ), );