title: How URL encrypt and decrypt in Codeigniter. Every Refresh encrypted value change
body: <p>i want to encrypt my url parameter such as:
  <a href="http://localhost/myapps/user/profile/john" rel="nofollow">http://localhost/myapps/user/profile/john</a>
  to
  <a href="http://localhost/myapps/user/profile/" rel="nofollow">http://localhost/myapps/user/profile/</a>{encrypted value of 'john'}</p>
  
  <p>in codeigniter.</p>
  
  <p>otherhand every refresh encrypted value change for specific data. But i need this static (unique value for specific input value always). </p>