BuddyPress.org

$my_excluded = array('1','15','16','17','18','19','20','21');

foreach ($this->blogs['blogs'] as $key => $value){

if (in_array($value->blog_id, $my_excluded)){

unset($this->blogs['blogs'][$key]);

$this->blogs['total'] = ((int)$this->blogs['total'])-1;

}

}

$this->blogs['blogs'] = array_merge( array(), $this->blogs['blogs'] );

The above should fix the issues you were having. Use the foreach() loop instead of the for() loop.

I tested this and excluded all blogs, some blogs, no blogs. Also with the letter select. The featured blogs loop in /directories/blogs/index.php needs a my_has_site_blogs() also.