How to create a select with the options taken from the DB with phpGrid?

I am trying to create a web with the framework PHPGrid , and I need the options of select are from a query [select u_id, name from teachers] where my name is also selected if the u_id is equal to the session.

I know it must be an array, but I do not know how to develop it.

 $class_query = "SELECT * FROM class_view";
    $grid["caption"] = "Asignaturas";
    $grid["sortname"] = 'curso';
    $grid["sortorder"] = "ASC";
    $grid["reloadedit"] = true;
    $grid["rowNum"] = 20;
    $grid["height"] = "auto";

    $list_q = new jqgrid($db_conf);
    $list_q->set_options($grid);
    $list_q->table = "alumnos";
    $list_q->select_command = $class_query ;

    $col = array();
    $col["title"] = "c_id"; 
    $col["name"] = "c_id"; 
    $col["editable"] = true;
    $col["hidden"] = true;
    $class_cols[] = $col;

    $col = array();
    $col["title"] = "Curso"; 
    $col["name"] = "curso"; 
    $col["width"] = "70";
    $col["align"] = "center";
    $col["editable"] = false;
    $col["required"] = false;
    $class_cols[] = $col;

    ol;

    $col = array();
    $col["title"] = "Profesor:"; 
    $col["name"] = "p_id"; 
    $col["width"] = "80";
    $col["align"] = "center";
    $col["editable"] = true;
    $col["required"] = false;
    $col["edittype"] = "select";
    $col["editoptions"] = array("value"=>'1 :    profuno;2  :   profdos;3   :   proftres;4  :   profcuatro;5    :   profcinco;'); 
    $class_cols[] = $col;

    $col = array();
    $col["title"] = "Editar";
    $col["name"] = "act";
    $col["width"] = "60";
    $col["search"] = false;
    $col["sortable"] = false;
    $class_cols[] = $col;



    $list_q->set_columns($class_cols);


    $list_q->set_actions(array(
            "add"=>false, 
            "edit"=>true,
            "delete"=>false,
            "clone"=>false, 
            "rowactions"=>true, 
            "search" => "advance", 
            "showhidecolumns" => false,
            "view" => true
        )
    );


    $outlist = $list_q->render("list100");