Sorry to dig up a post that's been inactive for a month. I hope this doesn't count as resurrecting dead threads.
I'm currently working with string arrays myself in order to generate an onscreen-log for the server-side of my game. Although techmuc's post provided me with the solution to my problem, there seems to be a typo in it and I just want to spare anyone else finding this topic the headache.
malloc uses only one parameter and therefore you have to multiply the number of elements with sizeof(STRING*). The code below should be the correct one and is working in my scenario.
STRING** tst;
tst = malloc(sizeof(STRING*) * number of elements);
for(int i=0;i<number of elements;i++)
tst[i]=str_create("#number of characters");
//now you can access the string array like this:
str_cpy(tst[0],"hallo");
