html special character in the when submit form

Hi all ,

I have a form that allow user to enter description , sometimes the
description value have html special character for example %20 and etc.

Inserting into the mysql database is ok , for example the description
in my table is 'wt%20%20'.

However . when i have href link which for instance
'../edit/id=wt%20%20' .

The mysql database cannot find the id in the table eventhough it
existed in the table.

How to overcome this special character issue ?

Thanks

.