Go to /public_html/components/com_easyblog and use an editor opening the file Constants.php. It should be around line 107.Remove the line like below screen-shot :
If you are at advanced level then you need to remove this on two pages…
where search for //print powered by start echo EBLOG_POWERED_BY_LINK; //print powered by end
and comment that echo line by adding //
that would do… yous is as good as professional version..