#11 Better formatting of categories

[kuli]

It would be nice to have the main page display the
categories in a better formmated table--like with multiple
columns, not just one column with X amount of rows.
With many categories (about 30-35 in my case), It does
not look very good, and is difficult to navigate. This
would be easy to implement with PHP, but since PHPinv
uses the PHP to do the work, and HTML to evalutate the
results, this makes it a bit more difficult than just
fetching the columns with php and echoing it in a
formatted table.