HTML content within main PHP page

Hi, my site is http://www.ikritiks.com

In the home page, it allows to use HTML content in the main body.

i.e., from "submission service solutions" banner to "Paypal Donate"

But there seems to be a lot of errors in w3c validation, what can I do ?
In the HTML content, we have used TABLE, so there seems to be some trouble in SE crawling also.

 

Follow the advice given, under each error: http://validator.w3.org/check?uri=http://www.ikritiks.com