Array
(
    [0] => Array
        (
            [id] => 1
            [parent_id] => 1
            [login] => 123
            [login_nickname] =>
            [password] => 123
            [subuser] => 0
            [subuser_id] =>
            [email] => usersemail@email.com
        ),
       [1] => Array
        (
            [id] => 1
            [parent_id] => 1
            [login] => 123
            [login_nickname] =>
            [password] => 123
            [subuser] => 0
            [subuser_id] =>
            [email] => anotheruser@email.com
        )
)

foreach($member_list as $index=>$member){
   foreach($member as $key=>$value){
      $member_list[$index][$key] = str_replace(array("n", "t", "r"), " ", trim($value));
   }
}

ini_set('memory_limit','256M')