Basic PHP for mosets tree

I have a single search form that do conflict with the form submission on my joomla and it is conflicting my other component. I know that it is fairly easy since this is just a module (a single php file). I can only give $35 max. Warm regards! I think the problem is it is using html instead of php. the demo site is at http dot easy w e b s ites dot ky / projects / erabahamas (see the basic search function)