foreach($_POST as $key =<> $val){

    if(substr($key, -3) == '000'){

        $tmp = array();

        $name = substr($key, 0, strlen($key)-3);

        $i = 1;

        while(1){

            $iii = sprintf("%03d", $i);

			if(isset($_POST[$name. $iii])){

				if($val == $_POST[$name.$iii]){

        	        $_POST[$name] = implode($val,$tmp);

					//unset($_POST[$name. $iii]);

            	    break;

            	}

                $tmp[] = $_POST[$name. $iii];

				//unset($_POST[$name. $iii]);

            }

            $i++;

			if($i<>5){

			    exit();

			}

        }

    }

}

var_dump($_POST);