To get your question answered we require 2 things...these are:
- The version of Moodle that you are using
- The Name and Version of the theme you are asking a question about
If you do not provide these then you will not be answered.
Thanks for to answer!
Moodle version is 2.9.1
Theme is E-Guru version 3.0.1
But what about those texts do you want to change?
If the string is in the 'lang/en/theme_eguru.php' file and as the theme is in the plugins DB then it can be translated in AMOS, see: https://docs.moodle.org/dev/index.php?title=AMOS_manual&redirect=no and https://docs.moodle.org/dev/Translating_plugins.