- if ( isset($this->category_structure) )
- return $this->category_structure;
-
- if ( empty($this->permalink_structure) ) {
- $this->category_structure = '';
- return false;
- }
-
- if ( empty($this->category_base) )
- $this->category_structure = trailingslashit( $this->front . 'category' );
- else
- $this->category_structure = trailingslashit( '/' . $this->root . $this->category_base );
-
- $this->category_structure .= '%category%';
-
- return $this->category_structure;