Hola Patriarka gracias por responder estos son los valores que obtengo 
  
Código:
 Array
(
    [0] => Array
        (
            [id_dept] => 1
            [0] => 1
            [nom_dept] => Sistemas
            [1] => Sistemas
            [estado] => s
            [2] => s
            [dept] => 1
            [3] => 1
        )
    [1] => Array
        (
            [id_dept] => 2
            [0] => 2
            [nom_dept] => Lanas
            [1] => Lanas
            [estado] => s
            [2] => s
            [dept] => 2
            [3] => 2
        )
)
Array
(
    [0] => Array
        (
            [id_dept] => 1
            [0] => 1
            [nom_dept] => Sistemas
            [1] => Sistemas
            [estado] => s
            [2] => s
            [dept] => 1
            [3] => 1
        )
    [1] => Array
        (
            [id_dept] => 2
            [0] => 2
            [nom_dept] => Lanas
            [1] => Lanas
            [estado] => s
            [2] => s
            [dept] => 2
            [3] => 2
        )
)
  no me había fijado y los esta repitiendo que podría ser?