title: Url parameters values with special characters are providing errors in view
body: <p>I have edited Url manager to provide SEO friendly urls but getting problem when the url have values with special characters such as <code>. or () or - or any other special character</code></p>
  
  <pre><code>http://localhost/nbnd/search/city/delhi
  
  In city action
  var_dump($_GET);
  
  output: array(1) { ["city"]=&gt; string(6) "delhi" } 
  
  but when url is with some special character
  http://localhost/nbnd/search/city/north-delhi or
  http://localhost/nbnd/search/city/north.delhi or
  http://localhost/nbnd/search/city/(north)delhi
  
  In city action
  var_dump($_GET);
  
  Output : array(1) { ["north-delhi"]=&gt; string(0) "" } 
  and so for other
  </code></pre>
  
  <p>this change in array values results in error.</p>