code: public function generateURLSegment($increment = null) {
  		$filter = new URLSegmentFilter();
  		$this->owner->URLSegment = $filter->filter($this->owner->Title);
  		if(is_int($increment)) $this->owner->URLSegment .= '-' . $increment;
  
  		// Check to see if the URLSegment already exists
  		$duplicate = DataList::create($this->owner->ClassName)->filter(array(
  			"URLSegment" => $this->owner->URLSegment,
  			"BlogID" => $this->owner->BlogID
  		));
  		if($this->owner->ID) $duplicate = $duplicate->exclude("ID", $this->owner->ID);
  		if($duplicate->count() > 0) {
  			$increment = is_int($increment) ? $increment + 1 : 0;
  			$this->owner->generateURLSegment((int) $increment);
  		}
  		return $this->owner->URLSegment;
  	}
docs: Generates a unique URLSegment from the title.
  
  @param $increment
  
  @return string URLSegment