orignla array:
Array
(
    [1] => intimate-partner-violence-essays
    [2] => foreign-policy-essays
    [3] => domestic-violence-essays
    [4] => gender-inequality-essays
    [5] => free-market-essays
    [6] => south-korea-essays
    [7] => world-bank-essays
    [8] => political-ideology-essays
    [9] => cold-war-essays
    [10] => global-economy-essays
    [11] => critical-review-essays
    [12] => developing-world-essays
    [13] => economic-development-essays
    [14] => natural-gas-essays
    [15] => economic-status-essays
    [16] => status-quo-essays
    [17] => africa-essays
    [18] => countries-essays
    [19] => agriculture-essays
    [20] => literacy-essays
    [21] => government-essays
    [22] => leaders-essays
    [23] => women-essays
    [24] => theorists-essays
    [25] => workforce-essays
    [26] => issues-essays
    [27] => gdp-essays
    [28] => history-essays
    [29] => china-essays
    [30] => london-essays
    [31] => thailand-essays
    [32] => corruption-essays
    [33] => claims-essays
    [34] => education-essays
    [35] => globalization-essays
    [36] => peer-reviewed-essays
    [37] => research-essays
    [38] => conclusion-essays
    [39] => britain-essays
    [40] => employment-essays
    [41] => people-essays
    [42] => investment-essays
    [43] => definition-essays
    [44] => english-essays
)

remove array:
Array
(
    [1] => intimate-partner-violence-essays
    [2] => foreign-policy-essays
    [3] => domestic-violence-essays
    [4] => gender-inequality-essays
    [5] => free-market-essays
    [6] => south-korea-essays
    [7] => world-bank-essays
    [8] => political-ideology-essays
    [9] => cold-war-essays
    [10] => global-economy-essays
    [11] => critical-review-essays
    [12] => developing-world-essays
    [13] => economic-development-essays
    [14] => natural-gas-essays
    [15] => economic-status-essays
    [16] => status-quo-essays
    [17] => africa-essays
    [18] => countries-essays
    [19] => agriculture-essays
    [20] => literacy-essays
    [21] => government-essays
    [22] => leaders-essays
    [23] => women-essays
    [24] => theorists-essays
    [25] => workforce-essays
    [26] => issues-essays
    [27] => gdp-essays
    [28] => history-essays
    [29] => china-essays
    [30] => london-essays
    [31] => thailand-essays
    [32] => corruption-essays
    [33] => claims-essays
    [34] => education-essays
    [35] => globalization-essays
    [36] => peer-reviewed-essays
    [37] => research-essays
    [38] => conclusion-essays
    [39] => britain-essays
    [40] => employment-essays
    [41] => people-essays
    [42] => investment-essays
    [43] => definition-essays
    [44] => english-essays
)