function get_cat_slug($cat_id) {
	$cat_id = (int) $cat_id;
	$category = &get_category($cat_id);
	return $category->slug;
}

function bp_blogs_record_post_activity( $post_id, $post, $user_id = 0 ) {
	global $bp, $wpdb;

	$post_id = (int)$post_id;
	$blog_id = (int)$wpdb->blogid;

	$post_categories = wp_get_post_categories($post_id);
	$new_events_slug = get_category_by_slug('new-events');

	foreach($post_categories as $c){
	$cat = get_category( $c );
	 if(!$cat==$new_events_slug){
			//get category slug from ID
			$category_slug = get_cat_slug($cat);

		 	//get group slug
			$group_id = groups_get_id($category_slug);
			}
	}

	if ( !$user_id )
		$user_id = (int)$post->post_author;

	// Stop infinite loops with WordPress MU Sitewide Tags.
	// That plugin changed the way its settings were stored at some point. Thus the dual check.
	if ( !empty( $bp->site_options['sitewide_tags_blog'] ) ) {
		$st_options = maybe_unserialize( $bp->site_options['sitewide_tags_blog'] );
		$tags_blog_id = isset( $st_options['tags_blog_id'] ) ? $st_options['tags_blog_id'] : 0;
	} else {
		$tags_blog_id = isset( $bp->site_options['tags_blog_id'] ) ? $bp->site_options['tags_blog_id'] : 0;
	}

	if ( (int)$blog_id == $tags_blog_id && apply_filters( 'bp_blogs_block_sitewide_tags_activity', true ) )
		return false;

	// Don't record this if it's not a post
	if ( !in_array( $post->post_type, apply_filters( 'bp_blogs_record_post_post_types', array( 'post' ) ) ) )
		return false;

	$is_blog_public = apply_filters( 'bp_is_blog_public', (int)get_blog_option( $blog_id, 'blog_public' ) );

	if ( 'publish' == $post->post_status && empty( $post->post_password ) ) {
		if ( $is_blog_public || !is_multisite() ) {
			// Record this in activity streams
			$post_permalink   = get_permalink( $post_id );

			if ( is_multisite() )
				$activity_action  = sprintf( __( '%1$s wrote a new post, %2$s, on the site %3$s', 'buddypress' ), bp_core_get_userlink( (int)$post->post_author ), '<a href="' . $post_permalink . '">' . $post->post_title . '</a>', '<a href="' . get_blog_option( $blog_id, 'home' ) . '">' . get_blog_option( $blog_id, 'blogname' ) . '</a>' );
			else
				$activity_action  = sprintf( __( '%1$s wrote a new post, %2$s', 'buddypress' ), bp_core_get_userlink( (int)$post->post_author ), '<a href="' . $post_permalink . '">' . $post->post_title . '</a>' );

			$activity_content = $post->post_content;

			bp_groups_record_activity( array(
				'user_id'           => (int)$post->post_author,
				'action'            => apply_filters( 'bp_blogs_activity_new_post_action',       $activity_action,  $post, $post_permalink ),
				'content'           => apply_filters( 'bp_blogs_activity_new_post_content',      $activity_content, $post, $post_permalink ),
				'primary_link'      => apply_filters( 'bp_blogs_activity_new_post_primary_link', $post_permalink,   $post_id               ),
				'type'              => 'new_blog_post',
				'item_id'           => $group_id,
				'secondary_item_id' => $post_id,
				'recorded_time'     => $post->post_modified_gmt,
				'hide_sitewide' 	=> false
			));
		}

		// Update the blogs last activity
		bp_blogs_update_blogmeta( $blog_id, 'last_activity', bp_core_current_time() );
	} else {
		bp_blogs_remove_post( $post_id, $blog_id, $user_id );
	}

	add_filter( 'ass_this_activity_is_important', '__return_true' );
	do_action( 'bp_blogs_new_blog_post', $post_id, $post, $user_id );

}
add_action( 'save_post', 'bp_blogs_record_post_activity', 10, 2 );