id |  title | model | body |
----------------------------
 1 |  ВАЗ   | 01    |Седан | 
 1 |  ВАЗ   | 06    |Седан | 
 2 |  ГАЗ   | 24    |хечбек|  
 3 |  Моквич| 2140  |комби | 

$sql = "SELECT DISTINCT i.*
            FROM cms_uc_items i
            INNER JOIN cms_uc_cats c ON  c.id = i.category_id AND c.parent_id = 1001
            WHERE i.published = 1
	    GROUP BY i.title ASC ";

id |cat_id|  title | model | body |
----------------------------
 1 |    101  | ВАЗ     | 01    |Седан | 
 4 |    101  | ВАЗ     | 06    |Седан | 
 2 |    101  | ГАЗ     | 24    |хечбек|  
 3 |    101  |Моквич| 2140  |комби |