Hiding table cell populated with php data using a tickbox and dropdown function

[Confuzzled]

Hi.

 

I have a table that I've created using html and php to draw data into it from a database.

The table has 4 headers:

 

Name, Description, Group and Completed

 

I want to add a drop down to the Group column so that i can select which i want to see and then it would filter the collected data and just show me the selected group.

 

At the moment, i have a standard html dropdown with the group names but it obviously won't filter without some help. Is there some way to do this? 

 

On a second note. The Category column contains checkboxes next to every row that is populated in the table. Is there someway that I can get that to hide the row it's on upon clicking it but to have the checkbox still visible so as to unhide it when wanting to see it again?

 

Many thanks for your time and help