add_action( 'init', 'sportflash_rewrites_init' );
function sportflash_rewrites_init(){

    add_rewrite_rule(
        '([^/]*)/([^/]*)/([^/]*)/([^/]*)/page/([^/]*)?',
        'index.php?category_name=$matches[1]&sport=$matches[2]&sex=$matches[3]&age=$matches[4]&paged=$matches[5]',
        'top'
    );

    add_rewrite_rule(
        '([^/]*)/([^/]*)/([^/]*)/([^/]*)/?',
        'index.php?category_name=$matches[1]&sport=$matches[2]&sex=$matches[3]&age=$matches[4]',
        'top'
    );

    add_rewrite_rule(
        '([^/][^klubovi]*)/([^/]*)/?',
        'index.php?category_name=$matches[1]&sport=$matches[2]',
        'top'
    );
}