wordpress categoriy no index follow

function add_noindex_tags(){
 $paged = intval( get_query_var( 'paged' ) );
 
        if(is_search() || $paged >= 2  || is_404() )
 echo '<meta name="robots" content="noindex,follow">';
}
add_action('wp_head','add_noindex_tags', 4 );

# Add noindex tag to specific pages.  
if( is_page( array( 14, 22 ) ) )
echo '<meta name="robots" content="noindex,follow">';

wordpress category canonical

<link rel='canonical' href="<?php echo get_category_link(the_category_ID( $echo )); ?>" />