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I have some extensive examples of accessing PROGMEM here.

I've adapted one of the examples to show how you might do something similar to what you want:

const int NUMBER_OF_ELEMENTS = 10;

const char Message0000 [] PROGMEM = "Twas bryllyg, and ye slythy toves"; 
const char Message0001 [] PROGMEM = "Did gyre and gymble"; 
const char Message0002 [] PROGMEM = "in ye wabe:"; 
const char Message0003 [] PROGMEM = "All mimsy were ye borogoves; And ye mome raths outgrabe."; 
const char Message0004 [] PROGMEM = "\"Beware the Jabberwock, my son! \n The jaws that bite, the claws that catch!"; 
const char Message0005 [] PROGMEM = "Beware the Jubjub bird, and shun\n The frumious Bandersnatch!\""; 
const char Message0006 [] PROGMEM = "He took his "; 
const char Message0007 [] PROGMEM = "vorpal sword in hand:"; 
const char Message0008 [] PROGMEM = "Long time the manxome foe he sought - "; 
const char Message0009 [] PROGMEM = "So rested he by the Tumtum tree, \n And stood awhile in thought."; 

const char * const messages[NUMBER_OF_ELEMENTS] PROGMEM = 
   { 
   Message0000, 
   Message0001, 
   Message0002, 
   Message0003, 
   Message0004, 
   Message0005, 
   Message0006, 
   Message0007, 
   Message0008, 
   Message0009, 
   };

void sayPhrase (const char * const * message)
  {
  const char * ptr = reinterpret_cast<const char *>(pgm_read_ptr (message));  // pointer to message
  Serial.println(reinterpret_cast<const __FlashStringHelper *>(ptr));    // and print it
  } // end of sayPhrase

void setup ()
  {
  Serial.begin (115200);
  Serial.println ();
  
  for (int i = 0; i < NUMBER_OF_ELEMENTS; i++)
    sayPhrase (&messages [i]);

  }  // end of setup

void loop () { }