add_action ('wp_loaded', 'my_redirect_function');

function my_redirect_function() {

  $ip = '';

     if (!empty($_SERVER['HTTP_CLIENT_IP']))   //check ip from share internet
     {
       $ip=$_SERVER['HTTP_CLIENT_IP'];
     }
     elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))   //to check ip is pass from proxy
     {
       $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
     }
     else
     {
       $ip=$_SERVER['REMOTE_ADDR'];
     }

     $country = file_get_contents('http://geoip.maxmind.com/a?l=6QT6fNSdtMVw&i='.$ip);

     if( $country == 'IE' ) {

         wp_redirect( get_bloginfo('url') . "/ie/" );

         exit;

     }

}

if( $country == 'IE' ) {

if( $country == 'IE' && substr( $_SERVER['REQUEST_URI'], 0, 4 ) == '/ie/' ) {