the view res.users.groups i keep edit the line <field name="sel_groups_3_4"/>

<?xml version='1.0' encoding='utf-8'?>

<field position="replace" name="groups_id">

  <group col="2">

    <separator colspan="2" string="Application"/>

    <field name="sel_groups_1_11_12"/>

    <newline/>

    <field name="sel_groups_21_22"/>

    <newline/>

    <field name="sel_groups_13_23_24"/>

    <newline/>

    <field name="sel_groups_26_27"/>

    <newline/>

    <field name="sel_groups_3_4"/>

    <newline/>

  </group>

to

  <field invisible="1" name="sel_groups_3_4"/>

and it's work as i want but after a while the code return to it's original form and remove my edits