Hide Group Members and Author
By ezra vancilNormal:

You have two options you can hide the entire statement of who the owner is and how many members it has, or you can just hide the owners name and the members number.
Hide the author and members statement:

For this we will use our trusty display none, but to make sure we don't effect other elements on other pages, we will let our CSS know it's only on the groups page:
#groups-list
.search-listing
.listing-questions li
{
display: none; }
Hide just member number and author
name:
To hide just the member number and author name we will use the "Strong" tag.
#groups-list
.search-listing
.listing-questions li strong
{
display: none; }
You will notice that this changes your layout a bit, and it
should because when you hide something it takes it out of the line,
the space that it once held is gone. So if you want to keep the
formating just the same you can also just change the color of this
text to the color of your background like so:
#groups-list
.search-listing
.listing-questions li
{
color: black!important; }
You could just effect the member OR the author, but this would get into javascript which is a little to expansive for this post