My problem solved!

Thanks a million you saved lot's of my time
Appreciate all genius friends

add_lapp_function($level, $label, $link = "", $access = 'SA_OPEN', $category = '')  or add_rapp_function($level, $label, $link = "", $access = 'SA_OPEN', $category = '')  : lapp/rapp (stands for [b] left/right [/b] application)

as for the menu title in the main menu, you need to change, the $name variable ("ordres" to whatever is your need)

$this->application("orders", _($this->help_context = "&Sales"));

keep in mind that if you change the displayed text directly in the source code, you wont be able to use any translation for it, you'll need to do some customization to you .po file.

Thanks for using FA

As far as I learned from this forum masters you should follow below instructions to fulfill your needs

To do change on some items in menus, you need to do like as translation:
1- Install PoEdit software  from http://www.poedit.net/
2- There is one PO file on lang\new_language_template\LC_MESSAGES directory. Open the PO file with PoEdit software then do whatever changes you'd like and finally update the language/add new language.

To enable/disable some Items you will go through "User Accounts Setup" & "Access Setup"
If you want to hide the disabled items you just need to do one more thing, just change "$hide_inaccessible_menu_items = 0;" in "config.php" file to 1.

That's all

  Sales Quotation Entry I would like to call it Sales Quotation
  Sales Order Entry- I would like to call it Sales Order
   Invoice Against Sales Delivery I would like to call it  Convert Delivery Note to Sales Invoice
 
Some Items I need to remove them e.g Template Delivery,  Template Invoice

2-PURCHASES

  Outstanding Purchase Orders Maintenance-REMOVE
 
  Direct Invoice I would like to call it -Direct Supplier Invoice

So that is my idea, help please, I can do the editing on my own after knowing the files..