How to replace the label ton text box in JQry?

Hi,

I have a phone number label to be loaded dynamically in my ascx page, beside the label I have the button to change

When I click the change button I need replace the label to set of textbox control with default values shown in label and an option tosave and cancel.When saving it need to calling some server side functionality to save to restore the same with updated label and change button

But all the controls need to be loaded ynamically.

Please help me to do so.

-Thanks